Install from the GNOME Shell Extensions website
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GNOME Shell extension to hide the cursor on inactivity
For use on Wayland, since unclutter, unclutter-xfixes and xbanish only work on X11.
Thanks to Iago-lito <iago-lito@etak>, whose contribution corrected the timer behavior. Now the cursor hiding timer will start when the mouse is idle so that the cursor hides after the set timeout as originally intended.
GNOME Shell 45 and later are supported.