Question regarding MC261534 and MC282480

[ErikVet]

Hello,

in the MC261534 (and later one) was communicated that SharePoint Permission Option Menu will be gone from "Private Channel Sites" aka "Teams connected team sites".

Permission for a Teams connected teams sites should be managed in Teams. 

So far so clear !

Can please somebody tell me a little bit more about this at this is not 100% clear for me. 

• Does only the Members or Owner Groups (SharePoint Group e.g. "Member of xyz Site" or "Owner of xyz Site" on the SharePoint (Private Channel Site) be managed automatically ? e.g. the groups will be managed automatic with the settings from Teams
• will other, additional SharePoint Groups be deleted which were created before ? 
• after Microsoft has turned on the automatic "managment" will it be possible to add SharePoint Groups via PnP or other API's ? 

Many thx for clarification if somebody already has seen this in real life ? 

Erik 

[#2]

I spent some time reading about RoadMap 81945 as well as MC261534 and MC282480. It's so confusing because it sounds new but in fact the changes are subtle.
https://docs.microsoft.com/en-ca/SharePoint/teams-connected-sites

First, "Private Channel Sites" are not equal to "Teams connected team sites".
Regular chanel > Teams connected team site = parent team connected site
Private chanel > Teams connected channel site = channel site

Also, nothing new here, it wasn't possible to change permissions in 'Channel Sites' (private chanels) for a long time already.

The changes are explained here:
https://office365itpros.com/2021/06/21/changes-sharepoint-layout-teams-private-channels/