apply xmp file to dng on export

this might be a bit of a long shot, but hey - lets try.

I shot a timelapse sequence using holy grail method. I ran those dng files through LRTimelapse 4.8.3 (a little outdated, I know). I use LRT to write xmp filesto balance exposure spikes. I do not use keyframes to adjust the look. SO more like a technical grade. Back in LR Classic I read "metadata from file" for all photos. After waiting for thumbs to refresh you can see that you have an equalized image sequence in LR. Now i want to export dng with those xmp changes applied. Like how I see it in the UI. But that does not work. Reading that exported sequence into a different application and comparing it to the original seq shows, that no changes are applied. Any idea if that can be accomplished?

I want to stay in dng to bypass color management found in other file formats. My goal is to export exrs in a secondary step from another application.