If you submit your ID to a random app with no history and unknown developers and company, don't be surprised if it gets leaked. This app is garbage and should be removed immediately. The company most likely used AI.
Tbf, PornHub's ID verification is better than this. You can trust PornHub more than this random app with your ID, and there's a reason why. This app just collected your ID for no reason. No wonder they only allow US users!