Most of the time, we are facing issues in updating the images because are not retrievable via the link or the supplier does not provide the full link to the product images.
Besides that, for image URLs that fail to import to Shopify and the image files that are not publically downloadable. Other than that, Shopify also doesn't allow images that exceeded the maximum resolution of 20 MP. So there is a way to modify them.
6. Once done you can enable the toggle to modify the image URL.
In your feed file, there is an image extension like hello.jpg and you want to upload it to stock sync. You can use this way, make sure to upload those images to the imagekit.io
Then, paste the front link you created via imagekit.io https://ik.imagekit.io/fq4knorws/ to the URL prefix.