Originally user used a drop down list for Groups it would provide a list of all the groups in the environment. That is no longer the case in the 2022 version of Hub. Now users will only see groups that belong to a Department. 
In my example environment I have exactly two groups that are tied to this test department. This means I will only see two groups in a group drop down list. To add multiple groups a user can add a member organization to add additional groups to a Department.

To see how this carries over to other parts of Hub see the example below:

Notice how only two groups show up in the Request window rather than all of the Foundation groups. Going forward  a Group now has a Department membership or it will be difficult to use them.