PROBLEM:
When there are no products in the cart that are eligible for pickup, the “Pickup in store” delivery option should NOT be displayed. It will only ever show the warning in the image below, so why confuse the customer by showing it in the first place?
Hey this has been a long due issue with Shopify for many raisons one of them being they don’t support mixed carts.
You can find a detailed Github disscussion to upvote here https://github.com/Shopify/function-examples/discussions/218