Great question, @_thesouq! And thanks for your second post in the Community ✨

I would not recommend using Square Online Checkout links if you want to offer multiple fulfillment options in a single link.

Checkout link fulfillment settings pull from your Square Online settings - however, only one fulfillment type will apply to a checkout link, as they are intended to be quick purchase links. If you want to offer pickup and shipping for one item using checkout links, we recommend that you duplicate the item and include in the title whether the fulfillment type is pickup or shipping. Then, you can adjust the fulfillment type to match.

Let me know if you have any questions about this!