After editing several files to get a working gfx menu I liked, looking good, all OS booting ok. The background picture makes it necessary to tweak terminal background and some other colours. Lots of options to understand.
Terminal is good, still missing history and tab completion, also paging option (like efi shell -b on individual command). Other multiple terminal configurations work well (not popup).
Not tried on text screen, default is too small, refit efi shell can change text mode to max native resolution (mode command), but IDK why one would need to use text mode on Apple.
Attached pictures and detail on edited files.
This was grub.cfg