I can temporarily start producing installers with these names. Due to MB-51352 this will not be necessary anymore sometime prior to Morpheus GA.

I have added ubuntu22.04 installers for Morpheus. I have also dropped ubuntu18.04 - Ian McCloy please confirm that this is correct (my understanding is QE requires us to support no more than two major versions of any given distro, and ubuntu18.04 end-of-support is before Morpheus' expected GA).

Thats correct, see MB-51315 

Build couchbase-server-7.2.0-1012 contains voltron commit ff0a484 with commit message:
MB-51324, MB-51325, MB-51326, MB-51327, MB-50786: Distro updates

Build task is complete. Re-assigning to Ian - Ian McCloy  if you have separate tickets for QE to ensure they are testing on the new platforms, this ticket can be closed. 

Spoke with Mihir Kamdar briefly today to alert him that there are platform changes coming up in Morpheus; he will follow up with Ritam Sharma and probably contact you for details, Ian McCloy . QE won't be ready to test Morpheus builds for at least a short while however. For now resolving this ticket as the build component is complete; probably a new ticket should be filed for the QE portion.