I couldn't find the exact post, somebody asked for this feature to restrict the space members from adding other users to space, and here is the solution for you!!
Google chat space managers will now have additional capabilities to ensure effective conversations take place in spaces:
*Space configuration: enables space managers to choose if members can change space details, such as name, icon, description, and guidelines, or turn Chat history on/off for the space.
*Member management: allows space managers to decide if members can add or remove members or groups to a space.
*Conversation moderation: authorizes space managers to determine whether members can use @all in a space.
Currently, space managers can:
*Remove and add participants
*Assign or remove the space manager
*Delete a space
*Delete messages
*Edit the space description
*Update space access from restricted to discoverable or vice versa
For more info:
https://workspaceupdates.googleblog.com/2023/03/new-space-manager-capabilities-google-chat.html
Please note:
Rollout Pace