I didn’t see all of the pictures because I don’t have Snapchat. Can you post them here? I can tell you exactly where they were taken from and get a better idea if they were live. The lights often cycle thru many colors on the same night, sometimes in time with music. Without much tourist traffic due to Covid I don’t believe the music is on but I can certainly find out what colors they were on that night and if they are turned off at a specific time.The post has multiple pictures, showing the falls lit up as dark blue/turquoise and pink (it looks like two distinct blues, but it could be camera funkiness).
That would mean she either visited at least two different days or one is a stock picture.
ETA: Can different areas be lit different colors? It looks like two angles from the same location, the pink is on the "right," so maybe it is the same day. But it does look like shot from a "regular" POV, nothing professional/stock image-like about it.