That's an older version of the pride flag. There have been a few designs. The rainbow top to bottom one is still very popular. This website describes some of the different flags.
After seeing the video the ceo posted, as well as the messages from when tiktok got banned and then unbanned, I'm starting to think this is the reason
The middle of the bell curve only works in a vacuum, and the top of the bell curve is true with wind resistanceEdit: I misread the post
That's an older version of the pride flag. There have been a few designs. The rainbow top to bottom one is still very popular. This website describes some of the different flags.