The Parental Controls setting on your mobile devices or computer will not transfer over to the Apple TV Crave App.
We have adapted for the best experience for Apple TV by using the universal PIN that you had setup for Apple TV. This is set at the App level and not at the Content level.
For the best experience on Apple TV, parental controls for Apple TV are enabled through the device like other apps. Instructions can be found here: https://support.apple.com/en-us/HT200198