Dolby Vision not working? maybe?

[gaming09]

On my PC (running 4080) i cant get dolby vision to work on the native app i have to force transcoding (an option in client settings). 
                    Emby seems to handle this without an issue on windows 
on my phone Zfold5 - i get a blank screen   
on androidtv via Sony x80j Plays back fine 
on 2017 nvidia shield tv its purple/green
on 2019 nvidia shield tv (tube) its purple/green 

All using the official apps, i havent tried any of the non official apps (if anyone has suggestions im all ears)
Wondering what are my automated options for DV content since the android TV and android native apps don't have the same setting that the windows app does to transcode automagically 

Also why cant the windows app play it without transcoding? 

i have zero understanding of dolbyvision outside its an hdr competitor? 

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