Also here is a better screenshot and this is with a different game (deep rock galactic) the first was lethal company so its not exclusive to one game
Hello @Korgen1, this issue is already being tracked at https://github.com/ValveSoftware/steam-for-linux/issues/11012.
Closing as a duplicate.
Tested on Proton 9 & experimental with Lethal Company and Deep Rock Galactic
Icons and game names are not working properly with the gnome dock on GNOME 46.2
The icon displays as a gear and the name shows up as steam_app_(number)
Example:

This seems to happen for all games using proton, it only affects running games in the dock, game shortcuts show up perfectly fine.