It looks like that grub-efi-amd64-signed in jammy-proposed comes from https://bugs.launchpad.net/ubuntu/+source/grub2-unsigned/+bug/2043084, which still needs verification, btw.
It looks like that grub-efi- amd64-signed in jammy-proposed comes from https:/ /bugs.launchpad .net/ubuntu/ +source/ grub2-unsigned/ +bug/2043084, which still needs verification, btw.