Why the game not show on ps5 store

So the game becomes on plus psn store this month right for all stores ps5

On saudi arabia :saudi_arabia: store no generationzero why is that!!

I contact sony, they say contact u guy about why the game not show on saudi arabia store

Maybe due to the same reason, why for example in japan often are other games in PSPlus, too.
Contracts, rights, laws and similar.