Mouse pointer shrinks in size after switching to fullscreen mode
Host running Fedora 38, gnome-boxes-44.1-1.fc38.x86_64, AMD GPU.
VM running Fedora 38, mutter-44.0-2.fc38.x86_64.
This is either a GNOME Boxes issue or a Fedora 38 (Mutter) one, so feel free to move it.
Mouse pointer of the VM becomes much smaller after switching to fullscreen mode in Boxes. See the attached screencast: