!XCODE! Lock Down IOS device using BioMetrics

Tap to reveal, asks for biometrics to reveal and lock iPhone, tap another button to unlock the iPhone from the certain scene using biometrics.

Any articles or point in the right direction to help me with a project? I need to develop an app in which the user inputs biometrics to lock down an IOS device to a certain scene within an app, then be able to unlock the rest of the IOS device using same biometrics.

I'm pretty sure TopHat is able to do this within the IOS app. I know lockdown browsers exist, maybe it follows a similar path? Idk