How to export a sequence in HDR ?

Hello everyone!

I’m a beginner and I made a sequence with camera movements.
I was able to activate HDR with a blueprint as explained in the doc.

But unfortunately I’m having difficulties exporting my video sequence in HDR as I’d like.
I’ve tried AppleProRes, or .exr image files, which I then reprocess with Adobe Media Encoder, but I never get a satisfactory result…
Would anyone here be so kind as to help me export my footage in HDR?
I can find hardly any information on HDR with UE 5.4 despite my research…

Thanks in advance!