Want to add a widget to the Lock Screen
You can add a widget to the Lock Screen as follows.
- Touch and hold the Lock Screen
- Tap "Customize"
- Tap the widget area
- Tap "minical"
- Tap the widget you want to add
How to add and edit widgets on your iPhone - Apple Support
With widgets, you get timely information from your favorite apps at a glance on your Home Screen, Lock Screen, or Today View.