Why is dynamic group not working?

Question

My dynamic group isn't assigning my tablet after enrollment. I tried following the docs as much as possible, also communicated with a chat supporter who asked me to post it here for an expert answer.

I have some screens to give insight in how things look.

Answer 1

Is Your enrollment profile "patient" contain any devices ?
Try to match by name or other parameter here is a great article with examples:
https://learn.microsoft.com/en-us/azure/active-directory/users-groups-roles/groups-dynamic-membership

Answer 2

Not sure if it's the same with Azure AD, but in Server AD, you never see membership of dynamic groups.

It's "asked for" when needed, by the server.

I would say to test and see if it's working, not look in the portal for a "membership".