Problem scenario
You are curious why the odd versions of Ubuntu get so little attention. Why is this?
Answer
Even versions get long term support. If you are uncertain which version of Ubuntu to install, we recommend the highest even number release. As of February 2022, this is Ubuntu 22.x.
See this for more information: https://ubuntu.com/about/release-cycle
Be advised that odd versions will have an end of life that is sooner than the end of life for the previous even version. If your server will last more than one year it is important to use an even version (in most situations).