TeamViewer/AnyDesk/VNC is not "remote windowing", it's "remote access" to a whole desktop. And that's easily available for the wlroots ecosystem https://github.com/any1/wayvnc

But actually "remote windowing/apps" is even better supported, it's a universal proxy: https://gitlab.freedesktop.org/mstoeckl/waypipe Absolutely does not require any support from the core protocol.