The 5th Bullet Point states inaccurately that:
The Guest features I've tested with Debian 12.5 and openSUSE 15.6 are:Oracle VirtualBox Guest Additions are not available for Arm host platforms.
Therefore, features such as seamless windows and shared folders are not
available.
1 Mouse integration working in both X11 and Wayland sessions on both VMs
2. Shared Folders working in both X11 and Wayland sessions.
3. Seamless widows not working (as expected - Option 'greyed out')
4. Resizing VM windows manually by moving the VM window borders works in an X11 session but not in Wayland.
5. Full-screen mode works in an X11. However, when using a KDE Plasma Desktop with the Task Bar in it's default location at the foot of the screen (Windows Style) the Task Bar 'disappears' in Full-screen mode. But, if the Task Bar is relocated to the side or top of the VM window (Mac-style) it is still visible when switching to Full-screen mode.
Full-screen mode does not work correctly in a Wayland session - The visible window area does not re-size.
Can provide VBox.logs if required.