You can download Proton for use outside of Steam, I use it in Lutris and Bottles pretty regularly. Also, you should be able to get just about anything to run just as well in Bottles or Lutris as it will in steam, but I will admit it can take some tinkering with some games or software and there is a much easier option: Add “non-steam game” in Steam library and run whatever program you need through Steam anyway.

The trick is that isn’t a capital i, it is a lowercase L. Now with AL integration. Every program you run just has a picture of Weird Al and a snippet of a random song from his greatest hits album as a splash screen.