TikTok has become a lightning rod for controversy as a growing number of U.S. politicians call for the app to be banned. The Biden administration has threatened to ban the app because of security concerns but hasn’t actually made the move. Other representatives are against the ban, citing the need for free expression. On March 23, TikTok CEO Shou Zi Chew testified at a Congressional hearing to respond to lawmakers’ criticisms. But the hearing — which…