Developer Preview: Chat apps can now create (RPC, REST), update (RPC, REST), and get details about (RPC, REST) Chat space permission settings by calling the corresponding method in Chat API using app authentication with the https://www.googleapis.com/auth/chat.app.spaces
or https://www.googleapis.com/auth/chat.app.spaces.create
authentication scope, including creating announcement spaces.
To learn more about Chat app authentication, see Types of required authentication and Authenticate as a Chat app.