Team members not getting @Team notification banner

I am sorry if this is a duplicate post but when checking on the last one I posted I could not find it and my account isn't showing I posted anything.

The issue I am having is that I created a new team and then added two team members.  A bit later I posted a comment and used the @Team mention. As expected, Teams changed the @Team to the actual team name. Then I sent the post.  Neither of the people in the team received a banner notification that they had been tagged in the post.  I am really hoping that each individual doesn't have to go in and manually follow every channel in every team they belong to.

Can someone please tell me what I might be doing wrong?