I want to test the new options in Cryptsetup aimed at using the hardware encryption of Self Encypting Drives: # cryptsetup luksFormat --hw-opal-only /dev/sd*
I understand is not an option supported in the installer.
I have seen that. It covers how to set up the encryption. Similar intrusctions can be found in the Arch wiki. This is part of what I want to do, because I want to add the TPM unlocking.
My question is more focused on how to achieve this on Ubuntu (if possible) since we cannot access the command line from the installer.
AFAIK Fedora has added this option in their last iteration.
Untested, but there’s poetentially one roundabout way: install a flavor that uses the Calamares installer (like Lubuntu), as the command line is indeed accessible. Then you could install ubuntu-desktop and uninstall $flavor-desktop.