Currently, the Wayland protocol itself doesn't have a standard solution to global shortcuts. Instead, it's being pushed to the XDG Desktop Portal API, under the org.freedesktop.portal.GlobalShortcuts service:

https://flatpak.github.io/xdg-desktop-portal/docs/doc-org.fr...

This should work with Hyprland provided that you are using xdg-desktop-portal-hyprland, as it does indeed have an implementation of GlobalShortcuts.

I'm not sure if this API is sufficient for your needs, or if it is too much of a pain to use. Like many Wayland things, it prescribes certain use cases and doesn't handle others. The "configure" call seems to rely on xdg-foreign-unstable-v2 support, but AFAIK Hyprland doesn't support this protocol, so I have no idea what you're supposed to do on Hyprland for this case.

I am sorry to see developers have to deal with things in a relatively unfinished state, but such is the nature of the open source desktop.