graphic design UX and shopify custom coding for mobile version ( embeded in a WP )

Hi, I am currently importing my listing from shopify to my wordpress using a "buy button" , copying the code automatically generated to a container of WP.
the desktop version is ok but I want t modify the mobile version.

https://greentouchmoss.com/mossartshop/

I would like to modify this page with all the products and the pop up window when selecting a product for a unique customer experience reflecting the beauty of my art frames.

IMPORTANT : I am open to suggestion. please show me examples of what can be done.