More structure in the teams with subordinate channels.
As if they can be opened one below the other in a list.
For example in Windows Explorer.

• team (main)
o under team 1
 sub channel 1
 sub channel 2
 sub channel 3
o under Team 2
 sub channel 1
 sub channel 2
 sub channel 3
o under team 3
 sub channel 1
 sub channel 2
 sub channel 3

The background to the requirement is:

I would like to map our organizational structure with it and work in small project teams in individual channels.
Within these channels, the usability of the APPS should be the same as in other free channels.
However, it would also be important here to assign users individually or to protect teams only for added people.