Yes, the release of the Steamdeck did wonders for pushing AAA gaming forward on Linux.

There was just an article on the front page earlier today about 75% of the top 100 games on steam running on linux, with the remaining 25% mostly being due to anti-cheat software that isn't updated to support linux yet.

Protondb.com has a database to search for compatibility and if adjustments to command lines or a specific version of Proton are needed for getting games running.