Looks like this DankDroneDownloader project claims it can downgrade the firmware version on the Osmo Pocket. Has anybody tried it? There is no point going to older firmware on the Osmo Pocket until I learned that the Osmo Pocket was able to capture full frame 200 FPS slow motion.

The 200 FPS option was later removed with the new firmware as they specified on the comments.

Hello there MuhlisG. Good day and thank you for reaching out, I hope that our fellow DJI members who owns the DJI Osmo Pocket and have tried using this link can give out the best recommendation with regards to this matter. In addition it would be best to download the DJI most recent DJI Mimo application for your DJI Osmo Pocket for reliability and compatibility purposes. Thank you.  

I have not seen this for Pocket 2, but it looks nice to get 200 fps.