Possibility of creation of sub-bubbles into a main bubble

Request from 2 customers:

A main bubble with creation of sub-bubbles under the main one.

The goal is to send a chat from the main bubble and all members of sub-bubbles will receive the chat.

And if an user send a chat in a sub-bubble, it's only for this one.

Like a tree structure with different people teams under the same Manager.

Microsoft Teams & Cisco Webex Teams have this feature !

Thank you in advance for your feedback.

Christian