This is a great idea. Thank you! We will look into it for sure. We're looking at WhatApp, WeChat, etc. too and trying to decide the best way for us to let the staff decide how they want to receive the message.
WhatsApp is ubiquitous, at least among millenials and above. I'm not sure what the zoomers are up to. It's unavoidable for parents especially because parent groups exist for everything from kindergarten to sports. Usage may decline in the years to come over Meta's data protection issues but there's no end in sight.