There are a lot of great features for the MyApps portal for Group management detailed here: https://docs.microsoft.com/en-us/azure/active-directory/user-help/my-apps-portal-end-user-groups

There is one glaring thing missing though, no way to be notified/respond to a group membership request. Almost the entire workflow is there for Group self-service and self-management, but when a user requests access to a group all the Owner gets is an email. It doesn't have a link to approve or even see more details. It would be great if the portal had notifications for them to respond, a single place to manage all requests.