I wrote before about scrcpy here: https://forum.sparkylinux.org/index.php/topic,5089.0.html
As scrcpy binaries are included in bullseye repos, there's no need to build them locally, so i packed a simple yad script to simplify the procedure.
Find instructions here: https://github.com/maurosh/screencopy
and a deb file to install here: https://github.com/maurosh/screencopy/blob/main/screencopy_1.0_all.deb
The script is published under GPLv3.