I don't know what quality this data is, and it's from the 2021-22 school year, so that may still have affected things with covid?
https://www.nfhs.org/media/5989280/2021-22_participation_survey.pdf
But I'm quite shocked at how relatively low the number of participants is for Pennsylvania. They have a state population of about 13M, close to twice that of Minn. But Minn has more high school boys basketball participants and it's only 20k vs 25k for football (40k in Ohio).
I thought maybe PA has a separate organization for private schools, but that doesn't appear to be true? PIAA for both?