@nprofile1q... @nprofile1q... As far as I can tell, Zenimax hasn't said anything about Steam Deck compatibility or Proton version in their patch notes, so I'm not sure what the connection to update 50 is. The information just seems to come from SteamDB.
I'm running the launcher from Steam, and that's been working fine with controller support for years. Will have to try it out later to see if anything's noticeably changed 🤷