Ubuntu 22.04 LTS Desktop and Server are still on-topic and specifically listed at Welcome To Support And Help as they come with 5 years of standard support.
The Ubuntu community flavors (like Lubuntu) only have 3 years of support, which is why they’re not in that list. The community flavors such as Lubuntu 24.04 LTS & Lubuntu 25.10 and other flavors are still supported and thus listed.
You’ll see that listed in all announcements, eg. selecting one for Ubuntu 22.04.5 it says
Maintenance updates will be provided for 5 years from the initial 22.04 LTS release for Ubuntu Desktop, Ubuntu Server, Ubuntu Cloud, and Ubuntu Core. All the remaining flavours will be supported for 3 years.
Ubuntu 22.04 LTS Desktop/Server is on-topic for support here, the community flavor support ended as per the release announcements.