I have a Custom App that connect to one of my courier firms and selects the 3 closest parcel lockers and presents them inside the Checkout Shipping selection page. I have attached a screenshot for this.
Now, I would like to add a widget-map into my cart page (as I dont have access to my checkout.liquid file, as I am on a "Shopify" plan). This widget will fetch the parcel locker or parcel point that the customer selects from, and I would like to pass this selection to the checkout and the checkout shipping selection page.
Would this be possible to show the selected parcel locker from the widget map as a variable that is later shown inside the checkout shipping option as a preselection on the first row?
Since our custom app can fetch parcel lockers from an api and show them inside the checkout shipping list, why would this not be possible?