When adding AzureBlobImageSharpCache to my Umbraco project(V13.9.2), i have my cache images stored as “application/octet-stream“ instead of folders/images file in the cache container.
The urls for an image are not actual links to the physical files. This site (https://www.olvg.nl/) is also an Umbraco 13 site that has it’s media and media cache in a blob in Azure. You don’t see that the images are coming from the cache and it doesn’t have the X-ImageSharp-Cache header. As far as I know, this is normal behaviour.