Single product image and gallery product not showing

Are you sure you are adding a featured product image in the right place? See this guide for more details: https://docs.woocommerce.com/document/adding-product-images-and-galleries/

If you are adding images there and they aren’t showing up, be sure to clear the website cache – this may need to be done at the web hosting level.

If that doesn’t help, then you’ll need to rule out plugin or theme conflicts: https://docs.woocommerce.com/document/woocommerce-self-service-guide/#section-4

Since we haven’t heard anything in a while, we’re going to go ahead and mark this thread as resolved. However, if you are still experiencing issues, let us know by opening a new thread (and feel free to link to this one).