i recently just installed solus and i was planning to play a game i decided to run the game threw proton because it worked better than wine in my old distro and i load it up but when i try typing it dose not register my typing.
strangely enough the steam overlay works when i press shif + tab i saw a post similar to this on the forum but it never went anywhere.
im using solus gnome edition

Have you tried changing some settings in "Linux Steam Integration" and checking if they have an effect? (Steam restart required)