Have you considered using something like Slack or Discord or (can’t believe I’m suggesting this) Teams, all of which sound like they’d be more suited to your use case?

This does not sound like an impossible stretch, works on more device types, and in the case of Slack or Teams can also be configured for HIPAA compliance (which while you don’t call it out, seems like it may be useful). Tens of millions of people use a chat system for work distinct from their personal friend groups, even if the venn diagram is a circle.