how to convert .jxr to a workable and editable format by keeping the hdr 16 bpc rec. 2100 color space st. 2084 pq tranfert function ?

[ACIXCIX0001]

.jxr hdr screenshots are generated by [xbox gamebar, nvidia shadowplay, obs]
tried everything :
jxrlib
jxrdecapp.exe -i 'obs.jxr' -o 'obs_jxrdecappconvert.tif'
open and exported to [.tif 16, .exr 16, .png 16] with photoshop plugin
open and exported to [.tif 16, .exr 16, .png 16] with affinity photo 2

asked almost every community forums [colorists, video editing, photo editing, .jxl, jxrlib binaries compiler, .......], no one appears to have a clue on how to process hdr .jxr images out and in of their original container.
because indeed ! as soon as the image is [extracted, converted] out of it s original container, admittedly it keeps it s 16 bpc bit depth but it absolutely does not keep the original [rec. 2100 color space, st. 2084 pq tranfert function] metadata !
and then, it s done ! the image has in all cases been converted to [srgb color space, gamma 2.2 transfert function], even if you would try to mark the resulting [.tif, .exr, .hdr, .png] metadata with the original hdr [rec. 2100 color space, st. 2084 pq tranfert function] metadata, the information is loast and the image will still appears washed out and dull no matter the viewer used ['microsoft photos', 'hdr + wcg image viewer']

here are some sample and you can notice all the original .jxr displays correctly, but none of the converted to other formats does :
onedrive

apparently, only the actual developpaer either of jxrlib or straight jpeg xr developper can answer this question !
so here it is......