A. To add the widget to your lock screen, first ensure that you have added the widget to your home screen. Long press on the home screen, tap the '+' icon, and select the MUBR widget. After adding it, go to Settings > Face ID & Passcode (or Touch ID & Passcode) and ensure that 'Today View' is enabled on the lock screen settings.

B. If the widget still does not appear, try restarting your iPhone. Sometimes, a simple restart can resolve display issues. Hold down the power button and slide to power off, then turn it back on.