Hello, Tackels.
Thanks for getting back to us here in Communities.
If you use the Do Not Disturb Focus, do you still see notifications and messages from non-approved contacts? Also, check and confirm none of these contacts are set to emergency bypass: Set up Focus on iPhone - Apple Support
•Choose people you want to receive notifications from (if any) during this Focus: Tap People or Add Person, select contacts, then tap Done.
•Choose whether you want to receive calls during this Focus: Tap Calls From, then select an option—Everyone, No One, Favorites, or All Contacts. To allow repeated calls (two or more calls from the same person within three minutes), turn on Allow Repeated Calls. Then tap at the top left.
Note: Regardless of your Focus settings, calls from your emergency contacts will always come through. See Allow calls from emergency contacts when notifications are silenced.
•Choose apps you want to receive notifications from (if any) during this Focus: Tap Apps or Add App, select apps, then tap Done.
•Choose whether you want to allow all apps to send you time-sensitive notifications immediately during this Focus: Turn on Time Sensitive, then tap at the top left.
Allow calls from emergency contacts when notifications are silenced
You can allow sounds and vibrations from emergency contacts to come through even when your iPhone or notifications are silenced.
1. Open Contacts .
2. Select a contact, then tap Edit.
3. Tap Ringtone or Text Tone, then turn on Emergency Bypass.
Or, create a Medical ID and identify an emergency contact."
Make sure you're using the latest iOS version: Update your iPhone, iPad, or iPod touch - Apple Support
If these additional steps still don't help, contact Apple Support.
Cheers!