Hi,
no issue on my side with krdc to remote the devices (linux arm, windows os…)
wayland since 3 months, krfb && krdc user since ~ 2018.
for the moment avoid to share a device (krfb) with wayland but prefer x11
krfb have an option, enable unattended access.
more infos :
what is the status of
sudo systemctl status nftables
take care, for the vnc like the ssh… your firewall have to be configure, port have to be allow