Good afternoon Natalie and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
We are sorry to hear about the tickets form disappearing from your events page. Yikes!
I would love to help you with this topic.
After a quick look at your website, I am indeed seeing quite a few events with tickets.
Would it be possible to give me an example of an event that stopped displaying tickets ?
Finally, could you please send me a screenshot of both the Edit Event screen and Edit ticket screens for that event ?
Hang in there!
Best regards,
Geoff B.