Yeah, Sony games are region-agnostic. However, you have to create a separate account for each store with a different gamer tag, to buy them. But once the game is bought you can play it under your home account.
I used to buy Madden in the US store just to get it three days early. Also got both the eu and us versions of Demons Souls; didn’t manage to pick up the Japanese/Korean version though that would have worked too.
Astro Bot is a lot of fun, possibly the banner VR game on PS, and Moss is very pretty for the PSVR games I’ve played out of that bunch.