Looks like 20.04.2 LTS has a regression!
Ubuntu 20.04.2.0 hotfix released
Shortly after the release of Ubuntu 20.04.2, on Thursday February 4 2021, a regression was discovered[1] which means that on certain systems and under certain specific conditions the Ubuntu installer can fail to install a Linux kernel. This renders the system unable to boot..
Source and further reading:
https://www.linuxcompatible.org/story/ubuntu-200420-lts-hotfix-released/
Ubuntu have now re-issued iso’s for this regression across these flavors.
Kubuntu
Ubuntu Budgie
Ubuntu Desktop
Ubuntu Kylin
Ubuntu MATE
Ubuntu Studio
Xubuntu
Windows - commercial by definition and now function...
