Hey @AdamQ
this is a good question. As far as I understand just the fact of connecting Whatsapp API with HubSpot API this invalidates the use of mobile app (because Whatsapp API is a 1 to 1 connection for the moment)
But maybe we can consult with the official 3rd party app partners to see if what you are needing could be an option.
Maybe you can get in touch with the teams of @WalterG for WhatHub, @FrancisdeTreble to get more details about this.