Hi Nathan,
I can help you with this! The Eventbrite representative is correct in that once your Eventbrite account is linked with your site all new events will be synced. However, events that have already been created on Eventbrite will need to be imported one at a time.
I did search the Eventbrite site to see if they have an option to download all of your events in a csv file or something similar but I didn’t have any luck. This appears to be a limitation in the Eventbrite API.
You might check back with Eventbrite to see if they have a way to bulk export all of your events, it’s definitely possible I missed something.
Let me know what you find out!
Cheers,
Trisha