As you can find here, the python3.11 package for Jammy is maintained by Ubuntu MOTU developers. You can find their contact information in the same link. The original maintainer in Debian is Matthias Klose.
The website suggests asking a question in Launchpad before contacting the maintainers.
Here's how to install latest python 3.11 (not an RC release) on Ubuntu 22.04 (it will be updated later when a new point release of 3.11 is available).
First, add the deadsnakes PPA.
sudo add-apt-repository ppa:deadsnakes/ppa
Then, install python3.11 with
sudo apt install python3.11
Finally, run it with python3.11
.
Warning: Never change the default version of python. You might end up destroying Ubuntu.