I'd pay for a well engineered macOS 11 theme for GNOME. Perhaps when GTK4 is out end of this year with support for blurred transparency shaders. Though I got to say Adwaita improved a lot recently.
I’d pay for a decent macOS keybinding theme for gnome, any price. Who gives a damn about the look, app marketers?
Heck, figure out how to let me use macOS keybindings on Windows and I'll give you a medal. The need to use (non-idiomatic, clumsy) Windows shortcuts on my MBP's keyboard is the reason I don't use Boot Camp.
autohokey is your friend
Sadly, auto hot key does not allow rebinding the native toolkits keybinding schemes, at least not without per-app significant effort or removing things like readline bindings.
I don't have the link on hand but I saw a project recently where someone did this. Themes have been around but this guy did keyboard shortcuts and a few other tweaks all packaged up.
What's a macOS keybinding theme? I'm curious as the macOS workflow is totally alien to me.