Hi Tristan,
Thanks so much for reaching out and for your interest in our products!
With Event Aggregator, you can import tickets via CSV file:
https://theeventscalendar.com/knowledgebase/csv-files-options-and-examples/
As far as integrating with third-party products, we cannot make any guarantees or provide related support, but we’d be happy to point you in the right direction to get things to play nicely together.
You have a few options as far as how things get updated. For example, you can create a scheduled import and choose to have events updated when they are updated in the source, or you can choose to have event changes preserved on the site.
https://theeventscalendar.com/knowledgebase/event-aggregator-import-settings/#update-authority
Let me know if you have any other questions on this topic!
Thanks,
Jaime