After a couple of seconds the RDP connection will just close.
I suspect this is something to do with codecs as I see “Failed to create OpenH264 decoder” in the logs when starting KRDC from the terminal:
Various versions of OpenH264 appear to already be installed from Flathub however:
Should KRDC use the codes installed from Flathub? or would codecs be the one thing I should be layering with rpm-ostree?
Update - removing KRDC which was installed by default on Fedora Kinoite, then installing from Flathub via the terminal: flatpak install flathub org.kde.krdc seems to have resolved this issue.