I use the image conversion feature on almost all of my websites because it means I don’t need an additional plugin. Unfortunately, when converting .jpeg or .png images to .webp, all metadata is lost. After doing some research, this seems to be a common problem with the .webp format when using Imagick and Gmagick. XMP metadata seem to be supported, but IPTC is not.
During a quick research, I found several sources that describe the issue and propose potential solutions. I haven’t tried it myself yet, but I thought that one of these links might help:
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