Group chats can be created by anyone in the Engagement app.
As a moderator, you can add a new Group chat and save it in Drafts or Publish it immediately.
If group chat moderation is enabled, when participants create a new Group chat it will first go to the "In review" tab and will need to be reviewed by the moderators. There they can decide to approve or reject it.
All of the Group chats created can be seen in Azavista as well. To see them, go to the Engagement app module -> Group chat tab.