Hi Joshua
We offer Event Aggregator, which works slight the opposite way. If you publish an event to Facebook first, it can then import it into your site.
With our Eventbrite Tickets, it would be creating an event on our site, then it can auto-publish to Eventbrite.
I’m wondering if the best option for you might look like:
Create your event with The Events Calendar & Eventbrite Tickets, » publishes to Eventbrite » publishes to Facebook. That may work for your needs and simplify the processes.
Thanks
Courtney 🙂