Unfortunately, I don’t think anyone ever implemented hardware encoding/decoding for H.264 Hi10P (or the other profiles that support higher bit depths).
The anime fansub community adopted H.264 Hi10P because it lessened color banding at reasonable bitrates. Unfortunately, there weren’t common applications for 10-bit at the time, so the industry didn’t bother with hardware support for it. There are specialized professional solutions, but nothing that made it into consumer chips.
HEVC (which had 10-bit support from the outset) was ready by the time HDR-capable displays became widespread, so chip designers and content producers focused on that instead.
H.264’s 10-bit profiles are thought to be a dead-end, although there are interesting rumors about Turing’s NVENC/NVDEC…we’ll have to wait and see.