If you're selecting Post To: Timeline (Public), but your broadcasts are not visible to the public, you may need too change Ecamm Live's Who can see you use this business integration setting on Facebook's Business Integrations page:
Go to Facebook's Business Integrations settings.
Click to edit the settings for Ecamm Live.
Scroll down to the setting called Who can see you use this business integration?. Ensure that it's set to Public.
Then click Save.