Any guides on creating 10 bit HDR textures for Unreal?

[Verinince]

@darthviper107

What you’re thinking about is only relevant to the output image, not the textures. I can’t find anything of what you’re talking about with Substance, the only thing I can find related to it is how things are displayed in the Substance viewport, which is the same thing that as what I’m trying to tell you, it’s about the output image, not the textures.

I have this substance tutorial:https://youtube.com/watch?v=Wx50zneK5KY
This article mentions tuning your game for HDR from the ground up. This is talked about in the ‘HDR and game development section.’
HDR's promise is stunted by reluctant developer support | PC Gamer

What do they mean by setting up with hDR in mind if it hasn’t anything to do with creating HDR textures?