Responsive e-commerce product page with React18

What are you most proud of, and what would you do differently next time?

I am most proud of building the lightbox and the slider for the product pictures. I would do the cart popups differently the next time because when you click on the cart icon the cart with a product popup appear and when you click on the number of product in your cart you get the "you're cart is empty" popup. I could not find a solution to make one appear when the cart is empty and when it's not.

What specific areas of your project would you like help with?

I would like help for refactoring my code as I find it difficult to do especially in React because I'm a beginner.