I am using Ubuntu 22.04 with Wayland for a kiosk system and need a way to hide the mouse cursor.
Most answers such as this one rely on x applications that won't work in Wayland so looking for a new solution.
You could replace the theme pointer with a transparent pointer. xcursorgen comes with the x11-apps package.
First I generated X11 cursor file with xcursorgen from transparent png file and then replaced all X11 files in /usr/share/icons/Adwaita/cursors/
Alternatively you can install a theme that has a transparent pointer.
cursor=null, see https://mir-server.io/docs/ubuntu-frame-configuration-options – Esther Jun 20 '22 at 19:47