Since Ubuntu is based on Debian you should be able to follow/adapt any guides you find that references Ubuntu, e.g. https://github.com/hetzneronline/community-c

Since Ubuntu is based on Debian you should be able to follow/adapt any guides you find that references Ubuntu, e.g. https://github.com/hetzneronline/community-content/blob/master/tutorials/install-ubuntu-2004-with-full-disk-encryption-with-clevis-and-tang/01.en.md https://github.com/hetzneronline/community-content/blob/mast... Good luck!