Hi everyone. I have noticed a bug with MGRR when running it with Bottles (GTK fronted for Wine/Proton). There is no audio in cutscenes and the console reports that xaudio2_7.dll couldn't be loaded. A fix for this is to not install Directx9 in Bottles, by which I mean that a Bottles with Costum environment has to be created, as that environment doesn't install any additional dependencies. Wine/Proton comes with its own Directx9 dll-s and MGRR seems to be happy with those.
Just wanted to report this issue in case anyone stumbles upon it.