Cannot edit Product Fields

Design help Ecommerce
1

Hello,

Why am I unable to edit the billing fields?

Screen Shot 2021-03-13 at 7.17.15 PM
Screen Shot 2021-03-13 at 7.17.15 PM3881×2609 519 KB

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

2

Because E-Commerce requires them to remain a constant.

3

Thank you for your responce!