Thanks a lot for making this exciting x86 emulation project!! I tried to wine winecfg in FEXBash (wine-5.0 comes with RootFS Ubuntu 21.10), it does place files in ~/.wine but it doesn't show any GUI ...

wine: created the configuration directory '/home/steam/.wine' 002c:fixme:winediag:__wine_start_process Wine Staging 5.15 is a testing version containing experimental ...