Making Finder use embedded JPG thumbnail for preview

I know that macOS has a crippled support of HEIF files, because it can't open those with a bit depth > 8 bits: https://apple.stackexchange.com/questions/420299/ Actually I have 16 bits HEIF files that macOS does not properly handle: blank previews in the Finder and not rendered by Preview (they are rendered as a blue blob). Files are fine since I can open them with Gimp. Now I've tried to embed JPEG EXIF thumbnails within them (thumbnails are properly created because I can re-extract them with exiftool) expecting at least the Finder to use them, but nothing changed. Is it possible to force it in some way? I suppose this has to do with Spotlight, but I really don't know it enough. As a reference, this is the command I used to convert HEIF files from TIFF: convert "file.tiff" -quality 90 "file.heif" And this is the command used to embed thumbnails: convert -thumbnail 2000x2000 -quality 70 -profile srgb file.heif jpeg:- | exiftool "-ThumbnailImage<=-" file.heif convert is from ImageMagick of course. I'm running macOS Monterey 12.6.7. Thanks.