I just switched over to using heroic launcher from lutris, its prettier and a smoother setup IMO. I have had issues as well installing some games from fitgirl, the install always failed. However they would install on windows just fine. So I did that then copied over the install files to my Linux hard drive and setup them up in heroic launcher.
I’ve only had to do this with 3 games from fitgirl, maybe I’m missing something but I could not get these 3 games to install on linux. This is why I keep a hard drive with windows installed on it :)
This is why I specifically pick phones that have custom ROM support. Then I don’t need to install gapps and I just use fdroid