Media/Ringtone Volume/System Volume

Steps:

1. Open the Settings app.
2. Tap on Sounds & Haptics.
3. Under Ringer and Alerts, drag the volume slider all the way to the left to set it to minimum.
4. Adjust additional options: - Vibrate on Silent: Enable or disable vibration when in silent mode. - System Haptics: Enable or disable touch feedback for system actions.