Congress voted to ban it because they fear China is using it as a spyop. Because it's a Chinese company, China gets access to all of the information, which is a national security threat.
TRUMP’S EDUCATION DEPARTMENT ANNOUNCES INVESTIGATION AFTER A BOY WINS HIGH SCHOOL GIRL’S POLE VAULT COMPETITION IN MAINE. Rick Ammarati reports. “Unbelievable! I don’t know what Maine is thinking.”