Works okay on desktop 7950 and kernel 6.6.2 (I’m still waiting for my 7840 mainboard). Are you sure you’ve enabled Steam Play for all titles in Settings? Like this:
Did a bit of testing yesterday (mostly to test the egpu but also without), Project wingman, cs2 and stellaris started up fine, didn’t do much actual playing though. Farcry blood dragon didn’t work but in fairness that doesn’t work on windows either XD
on my Framework 13 AMD 7840U @Fedora39 with kernel 6.5.11 everything runs also fine on the iGPU and eGPU (AMD 6750XT. Did you install steam as a snap or flatpak? Flatpak did not work (maybe there is also a problem with snaps?) so I installed it from the fedora extra repos