This feature request is still working its way through the backlog queue.
-WarrenChris Howett commented
Linking teams to a DL or a security group is one time operation. To maintain "dyamanic" groups and use attributes to update groups (derived from on-premises AD), the underlying group in a Team (an Office 365 Group) can be populated by Dynamic groups which kind of resolves this issue. Dynamic groups are the way forward rather than relying on static membership. More info here: