Looking at the JIRA ticket mentioned a couple of times earlier in the thread we see the following:
Only v6.0 is listed in the Backport Requested section. 
I don’t know how much work it would take to get 5.0.x packages, but based on past history I would like to think that they would be able to get this version working on 22.04 as well, especially since 5.0 will be supported until October of 2024. This means the next LTS version of Ubuntu (24.04) will be out before support on the 5.0.x line ends. There is even hope that 4.4 will be supported on Ubuntu 22.04.
Now having said that, I am just a community member like you, and the above is only my thoughts on what might happen. We’ll have to await word from one of the MongoDB team members to know what the official plans are.