u/Federal-Wait-8620

Hi all, trying to upload from my ace pro to Instagram reels and I can't work out how to get rid of the dead space at top and bottom of my video. Is this a setting I need to adjust before I record? I have changed the ratio to 9:16 to fill the frame but still left with the dead space.

See my reel on the left compared to what I'm looking for with one on the right.