Got it, @PJustice - I can think of a way you may be able to accomplish what you've described, but it would be considered a workaround, and would depend heavily on your customers reading directions when placing their orders.
Start in your Square Online Dashboard > Settings > Pickup & Delivery > select location > Order timing settings
Since it sounds like you'll be preparing all orders at the same time, I'd recommend not including a prep time > select Available Immediately (No prep time). The reason being that the time it takes you to prepare orders will not affect when customers receive their orders - since you want to offer a fixed delivery window of 2:00 to 2:30.
You'll want to toggle OFF Allow scheduled deliveries. This would allow your customer to schedule a time for the order to be delivered, which you do not want if all orders will be delivered at the same time. I imagine you'll also want to keep Order limiting toggled OFF, if you want to be able to continuously accept orders until 12:30.
You'll need to set your hours to end at 12:30 if you do not want customers to place orders after that time.
The key to this workaround making sense for you and your customers will be lots of notes on your website informing your customers about when to expect their order. I recommend being as clear as possible, in multiple places to avoid confusion (your banner, the item page itself, etc). You will want to make it very clear that it does not matter when people place their order - they should all expect to have their orders delivered between 2:00 and 2:30.
I hope this is helpful! ✨
