i'm still not seeing and actual HDR to SDR conversion option which was definately there before, all I see if tone map HDR options.
https://1drv.ms/u/s!AgvFafeelEBigqsK...SPe_g?e=gwRVIA
However... even on default settings this has made a huger difference to my HDR quallity. My goto test scene is harry potter goblet of fire, the end scene where he's fighting vold, prior to this I could barely see his mum and dad and I couldnt see diggery at all, they are all now perfectly clear.
I'll maybe have a further play with this as I now no longer need to think about converting to SDR.