@EdhawkYou probably need to add the EmuVariableUefi.efi driver to enable Clover to use a higher resolution when showing the GUI and boot screens.
I would recommend you look in your Clover bootlog to see which is the highest available resolution, before and after adding the EmuVariableUefi.efi driver to your setup.
As per rules, please update your hardware profile to allow others to help you easier@Edhawk
How to look for Clover bootlog? Any example?