sudo apt install google-android-platform-tools-installer
adb reverse tcp:3309 tcp:3309
* you can remove with adb reverse --remove-all
goto "Settings->System->Remote Desktop" and configure username and password, enable the "Desctop Sharing"
gsettings set org.gnome.desktop.remote-desktop.rdp screen-share-mode extend
install https://play.google.com/store/apps/details?id=com.microsoft.rdc.androidx Create a connection and set 127.0.0.1 as host
There a known issue with mouse visibility.
you can install the https://github.com/djinnalexio/eye-on-cursor/ extension as workarround.