Persistent notification on iPhone 14 screen

Hello mihnea241,

For help with putting your iPhone in Silent mode when switched the overlay should only show temporarily. If needed, the article here has more information about the feature: How to put your iPhone on vibrate, ring, or silent mode - Apple Support

To help, test a normal restart of your iPhone with the steps below found here:

"How to restart your iPhone X, 11, 12, 13, or later

1. Press and hold either volume button and the side button until the power-off slider appears.
2. 
3. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
4. To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo."

If the issue continues after a normal restart, reach out to Apple Support directly to further assist.

Contact - Official Apple Support

Contact Apple for support and service - Apple Support

Best.