1.Add "Most recent" Mode, and you can use double click and Ctrl + double click to switch between "All comments" and "Most recent".
2.Reel problem fix - facebook has a bug for Reel, if you switched to "All comments" mode then go next post, next post will still show "All comments", but actually shows "Most relevant" comments, I can't fix facebook's bug, so i make this script works even when the mode is "All comments".
3.Detect array update - as stated above, i have to increase the array size and Reel has the "Newest" mode, instead of "Most Recent" mode, i think they are the same thing. Anyway, don't know why Facebook decide put "Newest" only in reel.