More teenagers are playing soccer in the U.S. than ever before. The number of participants in U.S. high school soccer programs has recorded an all-time high in the 2018/19 season, with over 850 thousand boys and girls playing the sport across the country.
Look up Statista
Statista is an aggregator of stuff. You can't even see the source of any data unless you pay. So looking up things on Statista is like looking it up on Wikipedia, but a lot less reliable.
The participation of 6-12-year-olds has fallen in both rate and number steadily over the last 12 years. Unless there are a lot of people picking up soccer at ages older than 13, and I mean a lot, hard to see how what you've written can be true.
From the Sports & Fitness Industry Association, considered the gold standard in this kind of research, showing the numbers for active participation, not just any participation.