After the update hdr is no longer working, and of course dolby Vision or atmos dont work(its been years). Tried folder drivers but no luck
LG c1 6900xt
HDR is still working for me on my 7900XTX. 1000 nits peak brightness is not achievable tho. AMD PLS FIX.
My answer is surely too late to help, but "10 Bit Pixel Format" (not 10 Bit Color) must be disabled in the AMD Driver to support Windows HDR.