Without going too off topic here - What's the different between "isolation on guest" vs "client-to-client communication" isn't that pretty much the same thing?

And the toggle I mention on the guest via the android app, isn't that turning on / off isolation on the guest?

Afaik you can't turn off the isolation on guest

^ I am just trying to clear up that part, does the toggle suggest you actually CAN turn off the isolation.