WooCommerce Featured Product Image

I am guessing this is a Supreme theme question?

You can use this CSS for all product pages:
.product-template-default .featured-img {background-image: url(LINK TO YOUR IMAGE) !important;}

Or if you want to change it per product – change as required:

postid-33 .featured-img {background-image: url(LINK TO YOUR IMAGE) !important;}

For more CSS tweaks, see https://wpgeodirectory.com/docs/customizing-your-style/

Thanks

That is really a question for WooCommerce. The output on the product page comes from the WooCommerce.

Thanks