Create a Chat activity

Click "Edit mode" to enable editing.

Navigate to section where you want to add the Chat activity. Click "Add an activity or resource".

Select Chat activity.

In "General" section enter chat name in "Name of this chat room" field. Optionally, the description can be added.

In "Chat sessions" section you can select the date when the Chat would be available from and other settings as needed.

Click "Save and return to course".