ubuntu desktop 20-04-lts-on-raspberry-pi-4

https://linuxhint.com/install-ubuntu-desktop-20-04-lts-on-raspberry-pi-4/

realvnc

https://askubuntu.com/questions/1217255/ubuntu-18-04-4-lts-64-bit-on-raspberry-pi-4-realvnc-server-how