A message was sent and no hard or soft bounces are populating. This is a large send which should render some bounces.
Hard and Soft bounces are generated by a task that runs overnight. You will need to wait until the day after a send for bounces to show in the statistics.
If bounces are still blank after a large send that you expect to generate some bounces based on historical sends to the groups, then Contact Support and reference this article. , and reference this solution.