If more and more games are tested and verified on Steam Deck, why less and less games are playable under most recent version of Ubuntu? Since I upgraded to 23.

If more and more games are tested and verified on Steam Deck, why less and less games are playable under most recent version of Ubuntu? Since I upgraded to 23.04, most of Paradox and many others refuse to play. Is it something that Ubuntu broke, or a different Linux kernel that breaks OpenGL?