Install iPhone Backup Extractor, and then choose
Recover Screen Time / restrictions passcode from the
Utilities menu. You'll be guided through the next steps. You'll need an encrypted iTunes backup for this.
If you need help recovering other Screen Time data, please contact us directly.
About Screen Time passcode
With Screen Time, you can access real-time reports about how much time you spend on your iPhone and iPad, and set limits for what you want to manage. Screen Time lets you know how much time you and your kids spend on apps, websites, and more. This way, you can make more informed decisions about how you use your devices, and set limits if you'd like to.