Any item you sell on your online Weebly store can be sold through the POS.
The only difference is if you have custom questions on the online store item.
Custom question allow customers to select and answer or type in their own.
These questions don't transfer to the POS.
In most cases, you could use a modifier for selected answers.
For typed in answers, you would just put it in the notes of the item during the sale.
I'm assuming you are using the Weebly online store for the event sales.
If you're using another online sales system that isn't connected to square, then you have to set up the item in square.
If you go to your POS, in the library, search for the event item name and you should be able to add it to the ticket.
You can also add it as an item on your grid items. Provided you are syncing your online items with Square POS.
If I'm missing something from your question, let me know.
