Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Dear Nathaniel,
Good day! Thank you for posting your query in our community.
Based on your description, you can't receive the email notifications after changing the form to a group form. And the problem persists after you setup the related settings.
We assume the problem maybe relate to the backend, more resources need to be involved on the issue in your environment. I suggest you follow the steps in the article to open a ticket, this is a most efficient way to fix the issue in your environment. Because the engineers in related team have higher permission and more resource than us to help check it from background and collect the log remotely, and they will continue to investigate this issue further and provide suggestion for you.
Appreciate your understanding.
Sincerely,
Jazlyn | Microsoft Community Moderator