I have tried many different themes and many of the product images are not displaying on their individual pages.
They do display on the initial shop page, when you click on an item to go to its individual page, the box where the image is supposed to be is empty.
Also all of the thumbnail images likewise are not displaying.
I had a similar problem when I uploaded my images from the backend via FTP. But when I added the product images through the “featured image” tool for each product, uploading them through WP’s media library, they showed up.
How did you upload your images?
Do you have a sample link/page we can view to help troubleshoot?