What file format works for HDR timelapse video with Photoshop/Camera Raw/After Effects?

I’m trying to use all the bit depth in my timelapse sequences to create HDR versions but I can’t figure out what file formats to use.  The images are processed in Photoshop and Camera Raw and exported as 16-bit TIFF in the Adobe RGB color space.

I’ve tried converting those Adobe RGB images to Rec2100 PQ via Camera Raw but then the images are very low contrast in After Effects.  After Effects is properly set up to use Rec2100 media within a Rec2100 color space but the Lumetri scopes show that the brightest parts of the image never exceed about half of the allowable brightness value.  The same is true when I pull the Rec2100 PQ output into Resolve as well, so it’s a problem with the Camera Raw output.

The images look OK in After Effects if I work in a Rec2100 HLG space but there’s no way to output to that space from Camera Raw.  And Rec2020 looks OK in After Effects but Rec2100 is supposed to be the HDR workspace.

So I can’t find a combination of file formats that works for HDR timelapse video when using Photoshop+Camera Raw+After Effects.

Any suggestions?

Thanks in advance