I’m not sure, but this has me wondering how this works in Proton. I’ve installed plenty of fitgirl repacks through proton which worked very well.

Looks like Wine just acts like UAC is enabled and allowed, but still runs with the same privileges: https://gitlab.winehq.org/wine/wine/-/wikis/FAQ#head-c9e6502ad636315e905d07f7e44594757a6738e3%3A~%3Atext=Should+I+run+Wine+as+root

As of Wine 9.4, Wine programs run as a limited user by default, but will automatically and silently elevate themselves if necessary (in the same situations that Windows would spawn a UAC prompt), at which point they will report administrator privileges while still running as the same Unix user.