Simple app to mark orders as picked up

[POBJoe]

Hello Community -

I'm looking for a very simple app to allow my cashiers to mark In-Store Pickup orders as Picked Up. I don't want to use the Shopify app or anything complicated, I just want them to be able to hit a button when the order is picked up. I don't want them to be able to edit orders or interact with the Shopify backend at all, just mark orders as picked up.

Does something like that exist?

Thank you!