If the tickets for the event you are interested in are completely sold out, unfortunately, we do not have a waiting list function.
What you can do is keep an eye on the webshop to see if any available tickets become available in the future.
However, this rarely happens as event tickets are generally non-refundable, but there are cases where unpaid bookings have expired or where someone has used the cancellation insurance, making the tickets available in the webshop again.