Pop is semi-rolling distro, they don't need to release "point updates", they're not behind Ubuntu at all.
It is not the same 22.04 build from two years ago. It's using the same Ubuntu 22.04 LTS baseline and updates whatever they can with their own repos overwriting Ubuntu, such as mesa, kernel, and drivers. Every updates released to Ubuntu 22.04 LTS repos is made available to Pop users as well.
I just got an update on Pop for kernel 6.4.6 yesterday. Ubuntu 22.04.3 LTS is the most recent update and it only uses 5.19 kernel.
NexusMods is a private company with their own conditions for using their services.
You are not entitled to anything on others’ properties, including your ability to speak.
There is no freedom of speech here on lemmy.world either for you, they can restrict and block your posts from being seen by others, still their rights to do so.