Time-Sensitive Notifications were introduced in iOS 15! These are special notifications that override messages that have been muted under Focus. These messages are also marked "Urgent".
Pushsafer for iOS supports sending "Time-Sensitive Notifications" for important messages using the Priority parameter p = 1 be sent, e.g. Alerts for alarm systems or surveillance cameras.

To enable or disable Time-Sensitive Notifications globally, go to Settings > Pushsafer > Notifications

Open Settings, select Focus and edit an existing focus or create a new one. Press Apps and add Pushsafer or enable Time-Sensitive Notifications!