I live in the UK and most of the online stores let you pick the delivery slot after filling the basket, which is an infuriatingly poor UX, given the current circumstances.
A trick I picked up while working on an online grocery delivery store was to book a slot, put a multiple of a single item in to get over the minimum fee, then check out. You’ve then got the slot booked and reserved for you, and can go back and edit the order as the week goes on. Just don’t forget to take the 40 pints of milk out of your basket before the deadline for editing.
I live in the UK and most of the online stores let you pick the delivery slot after filling the basket, which is an infuriatingly poor UX, given the current circumstances.