Тhe current iOS design is well thought out, but not without its flaws - it definitely needs some polishing, an improved structure, and greater simplicity in order to create a better user experience. Although I did not focus on animation in this exercise, I think that it plays a key part in modern design. Let's focus on the elements of UI/UX design for product card.
• User card
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I came up with the user card that represents a seller but there could be another card for a buyer as well. I have also added "rating", which is a more prominent version of the user's feedback. It could potentially make sellers work even harder on improving their rating. As for users, it is easier to catch their attention with stars rather than words. Potentially, a user card can have even more CTA buttons (Follow the seller, Ask seller a question, for instance).
The key element of the product card is a CTA button which, in this case, is "Buy it now" - it's sticky and floats at the bottom of the screen.
I like the way this screen looks in the current version of the app except for the look of it. I have added an icon to the "Settings" to distinguish it (the icon is solid because it is small size). Basically, there would be two sets of icons: big/outlined and small/solid. As an option, we could add an "Edit Profile" link below the user's name.