Hello,
I saw the screenshots you attached and visited the URL you attached.
The product images are controlled by WooCommerce and our theme doesn’t influence it. WooCommerce provides some settings for the product images that you can find under Appearance >> Customize >> WooCommerce >> Product Images.
Screenshot for Clarification: https://ibb.co/fMwLjH1
1) The image compressing often changes the quality of the images. You can use images without compressing.
2) Make the image zoom enable Go to Theme Settings >> Product Page >> Images.
Screenshot for Clarification: https://ibb.co/7k1TQ1S
Best Regards.