It’s extremely consumerist, rather than focusing on capitalism like Animal Crossing.
In Sims 4, most of your money is likely to come from stuff like your sim going to work, your sim writing books (ludicrously effective if you keep at it), your sim selling unneeded gifts given to them for weddings etc. and so on. And you tend to be pretty short on money for a fairly long time. I haven’t played Animal Crossing but I get the impression it’s more about what, finding and/or making things, and then selling them, and then the money allows you to buy stuff and make more money and so on. That’s not really the case with Sims 4. You can also make money being an influencer/youtuber/internet person, I think that’s in the base game. There is an expansion where you can run a retail shop, but IIRC it’s not a particularly good way to make money (more like to lose it!), let alone some sort of hyper-capitalist thing.
But Sims 4 is very focused on acquiring goods, and those goods have distinct gameplay effects, and more expensive goods pretty much universally have more positive gameplay effects. In real life, often a mid-priced chair or sofa, for example, will often be as comfortable or even more comfortable than an expensive one. Or a cheap-ish chair might actually be perfectly fine. Not so in the Sims. It’s sort of understandable on a game-balance level but it’s kind of icky and very consumerist, in a spend-spend-spend kind of way, because the better stuff you buy, likely the better your Sims perform.
On top of this, Sims 4 doesn’t let you do good interior design, which might seem a bit “oh well”, until you note that Sims 3 did let you do this (I think with clothes as well). Instead in Sims 4, if you want stuff to match, you’re likely to have to buy “stuff packs” or even actual expansions - like a table of a certain style will be in the base game, but chairs to match it will be in one of the stuff packs. Whereas in Sims 3 they avoided this, and had a feature to modify the style of stuff - this meant you could make things look good without being a massive consumer. And this isn’t just consumerist in-game, they want you to literally buy stuff packs and expansions, so it’s quite meta lol.
The only thing which runs somewhat against consumerism is that bigger isn’t always better when it comes to houses, because of traversal time. A larger house, unless very carefully set up, can take so much longer to get around that it can be actively worse than a smaller one, even if it has more room for “stuff” in it. But this is clearly an accident rather than intention.
Sims 4 also sends some other slightly dodgy messages, mostly accidentally, like that your sim will get fat as fuck eating healthy foods and exercising, if they happen to be foods the game assigned certain values to, whereas eating unhealthily won’t do that if they just eat foods which have certain other values. None of this is displayed in-game nor does it make sense, because it was clearly somewhat arbitrary.
It also goes heavily into romance and features entirely off-screen sex (I can’t remember the term they use), i.e. if it’s in a bed, both sims go under the blankets and there are a lot of hearts - nothing graphic - but it could I think be emotionally taxing for some young 'uns (others will be totally unaffected or merely amused of course!), especially as it also has death, and sims aren’t really very familiar with this concept of “loyalty” so are easily prised away from marriages etc. Optionally there are also vampires who have powers including mind-control, which can be used to make unwilling victims give you blood (albeit IIRC that’s pretty much all it can do thankfully). The vampires are actually hilariously well-realized and in-depth (with skill trees and everything!), but are kind of serious/scary rather than just funny.
Going back to stuff packs and expansions, I should note that they are marketed pretty aggressively, and EA literally pays streamers/youtubers to promote them, and there are a ton of them, and they cost a lot of money. So if your daughter just gets Sims 4, but has been watching a streamer/youtuber play it, she’s going to be missing approximately a bazillion things she’s seen on video - like mermaids, vampires, wizards, aliens, college/university, seasons (including snow/winter), careers where you actually get to play the sim when they’re at work (which is pretty well-done), different towns (I think the game includes two pretty vanilla ones), tons and tons of other, more modern careers. So she may well then want that stuff and/or be pretty bummed that it’s not included.
Death is a thing - people do die in the sims and it can be quite sad. It’s never particularly graphic or anything, and there’s no cancer or anything like that, but they freeze to death, burn to death, get dehydrated and die, drown (swimming pools are a death trap lol), and so on, and so forth. Plus sims have emotions and can get very sad etc. - though this is usually fairly easy to fix unlike IRL.
Sims 4 is a huge game and there’s no doubt some stuff I’m missing. I don’t think they have drugs/alcohol/drunkeness per se at least. I think the major issue is that most of the stuff I’d have wanted when I was say 8 to 14 (assuming your kid is somewhere in there) is not in the base game, and would take buying a lot of expansions to get together. And the game is pretty good at letting you know this (though mostly before you start playing rather than once you are). I think older teenagers will easily get the “rip-off” aspect of the stuff packs and expansions (as will most 14-year-olds I suspect), so it would be more disappointing to them but less of a problem to you.
Oh and also, I played Sims 4 recently myself and the interface is, well, pretty old-fashioned. It’s a 2013 game that’s survived longer than it should have (they’re working on Sims 5 but it’ll be years), and the controls will probably pretty wildly old-fashioned for a kid - on the other hand, kids adapt really fast to this kind of thing, so it may not be much an issue.
EDIT - Homophobia is entirely absent at least - ironically as a result of a bug in Sims 1 back in the day, Sims accidentally became an LGBT-friendly series of games. Specifically, the official line was that initially they wanted to include LGB relationships, but later in dev, decided it was too risky, and cut them from the design document. However the coding team didn’t get the memo, and kept working from the original design document, and then they demo’d it in 1999, two female sims spontaneously made out, and they got a very positive reaction, so they could hardly back down. I mean that’s the official line, I suspect it was more intentional from the devs, but w/e, the end result was that sims in the Sims are “gender-blind” re: romantic relationships. In Sims 4 you can adopt children, and I think you can even adopt children that mysteriously look exactly like they were what would happen if those parents had a genetic child!