Could Kometa overlays add support for HLG (Hybrid Log Gamma) HDR video files (presumably in resolutions overlay). This is extensively used by the BBC (whenever if broadcasts 4k/UHD content such as the 2024 "Mammals" series), and I think Japan as well.
At the moment HLG videos are just flagged by the "resolutions" overlay as HDR, but like Dolby Vision, HLG is not supported by various devices and TV's so it would be useful to have a specific definition/graphic.
Plex does specifically identify HLG files e.g. "4K HLG (HEVC Main 10)" in the "Display Title" and "Extended Display Title" fields.