What about all the portals built by Redhat that allow kde and wlroots to tap into screen recording, audio, and soon even key captures? I get that Redhat doesn't actively submit patches to wlroots, but they also seem to be making stuff as open as seems reasonable.

As a Sway user, I haven't noticed anything that works on Gnome but not Sway, except for stuff like Zoom, which hasn't, until recently, used the portals.