How do you get new site roles to appear under group roles?

I added new sites roles to use for a specific group but they do not appear when I click try to add a member in the group. Is there a way to edit the list of role options that appear for group membership? At the moment, I have to manually add group members into this role after they join the group.



Edit
[edited by: Sebastian Ford at 5:39 PM (GMT 0) on Wed, Sep 28 2022]