Especially for subscriptions like gamepass that, just like the video streaming services, don’t have to make great content. It just has to be okay enough for people not to leave.
And the cheaper they can make that content, the larger the cut of the subscription fees they get to keep.
IIRC, within RHEL it goes fedora (next major) -> centos stream (next minor) -> RHEL (current major.minor).
With Debian and its derivatives (e.g Ubuntu) this means that Debian-unstable corresponds to fedora, Debian-testing corresponds to CentOS stream and Debian-stable corresponds to RHEL. (Roughly of course).
Ubuntu is based off of some flavor of Debian and is therefore downstream of it: Debian (unstable I think) -> Ubuntu -> Ubuntu LTS.
But as far as which version has the newest packages then sure, your list is correct.