I stopped by my old high school track for the first time in 20+ years and noticed the following girls stadium records posted near the track entrance:
400m - 56.3 in either 2003 or 2004 by XX. I forgot the exact year.
800m - 2:18 in 2017 by someone else
1600m - 4:57 by XX, set 1 or 2 years after the 56.3 400 record.
It seems that XX didn't seriously attempt the 800, as someone with those 400 and 1600 times would almost certainly have gone way under 2:18. But if she did train for the 800, what do you think her HS potential would have been?