I'm using Darktable to convert the 4 dng files to 16 bit tif's for Hugin.  I'm noticing that the first file is 5119 x 5119.  The subsequent 3 files are 4608 x 3456.  If I look at the jpg's ftom the Pocket 2, all 4 files are 4608 x 3456. Hugin is doing an excellent job stitching the tif's together, but I'm puzzled why the first file is a different resolution. The reason I ask is, I would like to do the same thing with Freewell anamorphic images.  But I don't know how to de-squeeze with 2 different resolutions.  Any thoughts? Stretch them both proportionally?

Hello there JohnAven. Good day and thank you for reaching out. Since this is a 3rd party software to edit your captured footage from your DJI Pocket 2. I hope that you will get the best recommendation from our fellow DJI members who uses the said 3rd party software and with regards to this matter. Thank you.

I have not tried pano's with the P2 yet.
Have you tried DNG output?

Works really well with dng files.  Hugin software is free and will stitch high resolution images perfectly.  However, it will not accept dng files.  That's where Darktable software come in.  It is used to convert the dng files to 16 bit tif files which Hugin can use.  Hugin can be set to run Darktable via command line automatically. Batch process.  
Btw, the pocket 2 also puts out high quality jpg's along with the dng files.  Hugin will accept jpg's without the help of Darktable.  
  
  

I might do a tutorial if I get a chance.