Not sure how legitime this website (they all can sound professional!), but ...

https://displayhdr.org/certified-products/

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PC monitors for professional content-creators.

Outstanding local-dimming, high-contrast HDR with advanced specular highlights:

DisplayHDR 1400 Certified Products


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And apparently displayHDR 400 actually can be just 8-bit!

https://displayhdr.org/#tab-400

Another article adding relationship between various HDR parameters.

https://www.electronicshub.org/what-is-an-hdr-monitor/

Note, table at the end of this article says hdr500 monitors can be 8bit but site above lists 10bit processing requirement at this level .... o.O confusing as always!

I think today ffmpeg/x265 can make static metadata HDR, but making dynamic one .... not sure how it even should be done, in editing context! Attach additional info to each vframe?