I tried recreating this by booting a virtual machine with Ubuntu 21.04 installed with a Kubuntu daily build from 2022-01-17 and I saw the grub boot menu and was able to boot Jammy.
I tried recreating this by booting a virtual machine with Ubuntu 21.04 installed with a Kubuntu daily build from 2022-01-17 and I saw the grub boot menu and was able to boot Jammy.