In Linux land, "not supported on" and "doesn't work on" are two very different things.

Ran into this the other day, when an update broke a game I was playing. Checked the game forum and the developer said that the workaround was to move a DLL up one level in the directory. When people asked if that solution would work for every distro, the developer would only say that it's supported on steam deck, since that's what they are testing on. Of course, that solution works on all distros, as far as I can tell, but the developer isn't going to test and verify that.