/usr/lib/grub/i386-efi/partmap.lst is in grub-efi-ia32-bin 1.99-21ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | part_acorn
part_amiga
part_apple
part_bsd
part_gpt
part_msdos
part_sun
part_sunpc
|