Add Field to Checkout

I would like to customize the current Native E-Commerce Cart. Have a couple of questions and thoughts. Maybe the Super Users code chime in.

  1. I need shipping address prepopulated with fixed zip code address to allow for shipping options to work.

  2. I would like to hide shipping address ( that’s easy already can do that but checkout breaks due to number 1 )

  3. Using HTML Embed . I would like to add a react control to populate a dropdown and and add a variable and save off to a database storage elsewhere. My thinking is you could grab the user emailaddress and the selected variable and match up that variable on the backend later. Maybe even there is a cart id or order id that is created that could be used.

Does anyone think that is possible. Maybe a modified Embed can prepopulate the shipping address zip code.