This is becoming an issue for Xbox. Literally nobody buys games anymore for Xbox, it’s almost exclusively a gamepass device even for diehards, so unless they have a deal with gamepass there’s almost no point. A few other devs have done this now even with no exclusivity.
I've definitely seen some hesitancy online about buying Xbox games in fear of them ending up on Game Pass and feeling like you wasted money.
With that being said, it's hard to pinpoint one specific reason some of these games are skipping Xbox. Especially when it comes to Square Enix who is pretty incompetent.
I really want Resident Evil 4 remake. But the game launches for $80CAD + tax, in a buggy state. Unless it's a game I literally will not wait to try (Hogwarts Legacy, Tears of the Kingdom, for example), I'm gonna wait. I have enough games on the backlog, by the time I'd have some time, I could probably get RE4 at 50% off and in a much better state.
Again, this is my reasoning. I know there are some people with the "wait til Game Pass" mentality