Access Groups not appearing in include rule dropdown

I have been using Cloudflare access for a few months now, and part of my configuration requires access groups that include users based on other access groups they are a part of. I have been able to do this in the past.

However, now when I create a group or edit existing groups that did not already have this configuration, I no longer receive this option in the dropdown menu.

Is there something I am doing wrong? Is this option now deprecated? I can’t see how this would have disappeared due to an error on my end. Please advise. Thanks!