But the best way to play it is to use VCMI. It's an open source re-implementation of the original game for the modern hardware. It also have a built-in launcher which asks you automatically download HotA or WoG after the first start. You can also install other mods from it. So convenient.
Global shortcuts are even worse. It also DE specific and users have to manually register them in DE settings. In order for your application to support this, it should export such functions via the Dbus interface. And all this incompatible with Windows (my app is cross-platform), so I had to provide in-app interface for global shortcuts too that works for Windows and X11 users.
What I don't like about Wayland is that many things are specific to individual DEs.
Like global shortcuts or taking screenshots. In my app I have two different solutions for taking screenshots in GNOME and KDE using XDG portals. It causes fragmentation.
Have you considered using Arch on which Manjaro is based?
This way you won't have issues with AUR. It's not hard to install, you can use archinstall helper if you want, it's available in the default installation media.
I think when people say "Linux phone" they mean GNU/Linux.