I have already updated Apache Sling MIME Type Service” before I raise this ticket. The issue is with adding the MIME type in Apache Jackrabbit Oak Blob Data Store. Do we update anything service. You have listed this one in your initial response.  

Thank you for your response. The issue is specific to the author instance, not the publish instance. I want to enable the preview of WebP images on an AEM 6.5 on-premise instance.

Thank you for the details. I have a few more questions. Could you please share your inputs on the following:I am unable to locate this configuration to register the MIME type for:Apache Jackrabbit Oak Blob Data StoreRegarding the generation of thumbnail images, I want to retain the original WebP for...

Please confirm if you're using AEM Cloud or AEM On-Prem version.

I'm not able to locate this config "Apache Jackrabbit Oak Blob Data Store". Can you share the screenshot?

I'm using AEM 6.5.22.0

Thanks for your reply. I have made changes only to the Mime Type configuration so far. Let me check the Oak Blob Data Store, as you suggested. Could you please explain more about the need to introduce a custom handler or override the existing DAM AssetProcessor service?

Hi,I have a requirement to enable previewing of WebP images (*.webp) in AEM On-Premise, specifically in the author instance. Essentially, when an image is uploaded, you should be able to see its preview. Currently, we’re unable to preview WebP images even though the WebP MIME type has been added to ...

Actually, we need to grant access through code rather than manually via user management.

Thank you for your reply. The access is required for the end-user accessing the site, and we only need to provide read access to the path /conf/project1. Regarding the suggestion below, do we need to create a non-system user for this use case?"3. If permissions are required only to access repo or so...