Why are some new games on Steam still Intel apps instead of native Apple silicon apps?
The main reason is because they can. Thanks to Rosetta devs don't have to make two ports for Intel and AS. So devs like Paradox don't bother and perhaps never will. At the same time Steam doesn't always tell the truth. It can state that a game is not a native AS port while it is. Best to check Steamdb.info. If it only says macos64 in App info/osextended it is a x86 app. If it also says macosapplesilicon it has a native port too. If it only says macosapplesilicon like Stray it doesn't have x86 port.