In other words only those users who have been invited to this chat will see it.
To show the entire chat with no filters, the All button may be pressed.
New team members can join a channel and read all the information previously shared by other users. Public conversations help you build a knowledge base of your organization with minimal effort. Use private groups for subjects that are sensitive, confidential, or limited to a small group of team members. The administrator sets the permissions that determine who can invite others to a private group.
To access a server you will need to connect to it, register an account and login. Chat server you can manage your account and configure profile, avatar, security, localization and notification settings. Use channels for conversations that are open to your entire team. Channels make it easy to find what’s going on with your team.
Is it possible to take a private Teams chat and make it available as a Channel?
The thought here is that the content of a private conversation becomes relevant to the overall group.