You can see info about how many people liked, commented on and reshared your reel on Instagram. If you delete a comment you've written on an Instagram reel that was shared to Facebook, it'll be removed from both apps.
To see info about your reel:
Tap or your profile picture in the bottom right to go to your profile.
Tap below your profile info. In the bottom left of each reel, you’ll see the number of video plays (how many times your reel starts to play). This doesn't include replays.
Tap the reel you want to see more info for. From here you’ll see a number below
that shows how many people liked your reel.
that shows how many people commented on your reel. Tap to see the comments.
that shows how many people reshared your reel to their story or in a direct message. Note that this number may not be accurate if your reel was shared before reshare counts were enabled.
Note that if you chose to recommend your reel to Facebook, your reel's plays and likes counts may include plays and likes from Facebook.