Automatically disable other pointing devices when an external mouse is plugged in. Optionally, switch the touchpad, trackpoint, fingertouch, touchscreen or a pen device on and off easily from the top panel. Dependencies: xinput, synclient (optional) TouchpadIndicator-extensions.gnome.org-v36 (Supports GNOME Shell 3.36 and below)

Extension Homepage https://github.com/user501254/TouchpadIndicator#touchpadindicator