You can try out the Proton-Cachyos with frame gen package if you're on arch-based systems with pacman -U archive.cachyos.org/proton/proton-cachyos-1:9.0.20240928-1-x86_64_v3.pkg.tar.zst
The Steam Deck sort-of has it on some games already, but it's a bit hacky. I did get 60fps Cyberpunk going though, which was a nice surprise. It'll be great to get a proper unified way of doing frame-gen though.
I've tried dlss frame gen on the finals and it seems to be working fine. Though at first I thought the audio crackling was because of fg, but it seems to be happening on all versions of proton.
Audio crackling is also an intermittent thing on windows for me since the latest season.
Not sure if it's the same of course but maybe it's not solely on proton.