scrcpy, a tool to display and control Android devices from your desktop, was added recently to the Debian testing (bullseye) and sid, and Ubuntu 20.04 LTS Focal Fossa repositories.
scrcpy is a free and open source application that can be used to show an Android device’s screen on a Linux, macOS or Windows desktop, allowing you to control it remotely. This can be done by connecting your Android device to a computer either via USB or wirelessly.