How do I add keywords or rating to a JPEG XL (jxl) image?

[superconductor]

Is it possible to add keywords and rating to a jxl image? If yes, how? "Edit IPTC" and "Edit XMP" are greyed out when I select jxl images. I'm using XnView MP 1.7.1 on Windows 10 Pro x64.

[xnview]

rating only with catalog, and not embedded metadata

[superconductor]

Oh, ok. I hope this can be changed in the future so that this data lives in the file. If this is stored in the file, it will be easier to retrieve rating and metadata even when using other software to view the photos or if XnView's catalog is lost/deleted.