It's not what you think - I just don't want my daughter accessing YouTube. Here's how I locked it behind Face ID and hid it in a folder she can't find or open.
Source: ADnet
Source Link: https://www.zdnet.com/article/how-to-lock-and-hide-apps-in-a-secret-folder-on-an-iphone-and-why-you-shouldnt-wait-to-use-it/