HDR mismatched gamescope version

according to this guide https://github.com/Heroic-Games-Launcher/HeroicGamesLauncher/wiki/Steam-Deck#hdr since the currently installed version is 3.15.14 the version in the link https://flathub.org/apps/org.freedesktop.Platform.VulkanLayer.gamescope should be 3.14.24. These versions are close enough for the Gamescope Flatpak to work through the Heroic Games Launcher.
but looking at the website it says the version is 3.16.1. is that new version the reason despite installing flatpak gamescope heroic games for hdr (lego star wars, hitman) doesnt work? or does the fact that installing in nested desktop instead of desktop mode affect it?
Flathub - Apps for Linux
The micro-compositor formerly known as steamcompmgr
GitHub
A games launcher for GOG, Amazon and Epic Games for Linux, Windows and macOS. - Heroic-Games-Launcher/HeroicGamesLauncher
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