I can't understand: HLG contents can be composed by very dark scenes with crushed blacks and very bright scenes with clipped whites... Why should it be different? Why can't a dynamically adaptive strategy be beneficial?No. It works with any HDR10.
I don't think HLG has the same metadata issues (dim/bright/fluctuating) as HDR10. So a single picture setting for HLG should be all you need. The JVC projector will automatically detect HLG and switch to it. And HLG can be changed to a custom picture setting, if wanted.