Try nomachine on AUR (en) - nomachine
See https://remmina.org/ as flatpak or snap
This also is free https://www.aeroadmin.com/
Might prefer something that is a bit more functional like AUR (en) - anydesk-bin
Or maybe you prefer GitHub - rustdesk/rustdesk: An open-source remote desktop, and alternative to TeamViewer.
Why there is no free and open source software at the level provided by
? Probably the answer is not in the code …