VVC HDR support?

[zyrill]

Greetings, the fastflix website lists VVC encoder not supporting HDR10 and HDR10+ - but according to the VVC docs, imho it does:
--hdr HDR mode of the input signal: SDR (off), HDR10 with PQ transfer function and BT.709 color primaries (pq or hdr10) or BT.2020 color primaries (pq_2020 or hdr10_2020), HLG transfer function and BT.709 color primaries (hlg) or BT.2020 color primaries (hlg_2020) see https://github.com/fraunhoferhhi/vvenc/wiki/Usage
What am I missing?