Cześć Adam,
Thanks for using our plugins and welcome to the forums!
Unfortunately at the moment that is not possible straight away with our plugins.
But there is a workaround, so you can do something similar.
For that you will need to use the WooCommerce product page to sell tickets and I think a WooCommerce plugin that gives you the product add-ons.
This article describes the modifications you need to do, to be able to use the WooCommerce product page: https://theeventscalendar.com/knowledgebase/selling-tickets-from-the-woocommerce-products-page/
I hope this will get you started.
We don’t take on customization projects like that, but in case you would like to hire a developer, then here’s a list. These are known people from our community, they should be able to help you out: https://theeventscalendar.com/knowledgebase/find-a-customizer/
Let me know if I can help you further.
Cheers,
Andras