Upgrading from 20.04 to 22.04

Hi Community,
I was able to perform a Gitlab update from 14.8.5 to the 15.5.3 (following intermediate steps) and all went well.
Manually upgraded PostgreSQL to 13.6 (from 12.x) as well: no worries.
Lastly I wanted to perform OS dist upgrade also, from Ubuntu 18.04 to 22.04…
Intermediate passage from 18.04 to 20.04 worked well: I was able to access the web page and everythin was working.
Then I tried the last jump from 20.04 to 22.04, that went well too (at least from OS perspective) but now I can’t access the web page anymore: error is “Unable to connect” when trying to get there via browser.

Standard gitlab commands looking good (restart, reconfigure, :check, etc) but I noticed a lot of listening ports changed from 20.04 to 22.04, that could be the reason I can’t access the UI.
The server is still accessible from standard ssh port though.

Could you help me to identify the issue here?

Thanks and best