To connect a Facebook page as a new Channel:
Make sure that you are an admin of the Facebook page you're connecting.
Click on the "Add Channel" button located at the bottom left of the screen.
2. Click "Connect" on a Private Channels, then click on Facebook. You will be asked to provide your credentials.
3. After logging in you will see a list of Facebook pages and groups associated with your account. Click "Select" on the page that you would like to connect, click "Save".