As of July, 2019 tandem footlaunch and wheel launch *IS* allowed in the U.S.A. That’s huge.
If you are looking to get training, don’t consider any school that will not insure you get at least 3 tandem flights before you go solo. You should understand and know how to prevent pendular swinging before going aloft whether learning on wheels or foot launch.
Pilots who don’t learn this have suffered life-changing injuries or death during the training process.