Hi @leventp !
Thank you very much!
The version including Nvidia's Path Tracing is only available in 5.4, as its from their custom branch.
The version I packaged with Unreal 5.5 vanilla is still not able to package in "early" 5.6 (it fails), so (probably) no one has packaged it yet. Maybe they are showing it through the Unreal 5.6 editor directly, but not as an executable.
Anyway, you can share any of those links (or by DM), if you think they claim it's a 5.6 executable.