I'm having shipping issues
The ideal is for the customer to buy at any store and pay at any URL, this is easy to do, the problem is shipping.
Stores with different addresses have different costs too, at checkout the freight is not separated or added, it takes into account the address of the store where the purchase is being finalized.
In this case it is not feasible for physical products, for digital products it is great but physical products are not good.
Ideally, freight should be calculated separately in the comparison cart
EXAMPLE:
Store A with address X freight charge 1 X
Store B with address Y freight amount 2 X
But Prestashop takes into account the shipping cost based on the store where the checkout is taking place.