User space upgrades are not supported nor tested. However I've upgraded recently a number of boxes from Focal to Jammy. So generally they do work. You are just using the standard Ubuntu upgrade mechanisms to do this (i.e do-release-upgrade). But note that Ubuntu doesn't support the upgrade from Jammy to Noble yet itself. That support comes with 24.04.1 to be released this summer. I'm waiting for that to do my own upgrades to Noble.
