No notification sounds after update 15.4.1

Greetings, Mamajenx2.

Start by checking your Settings to ensure that you’ve selected sounds for your notifications. 

“Change alert styles

1. Go to Settings and tap Notifications.
2. Select an app under Notification Style. 
3. Under Alerts, choose the alert style that you want. If you turn on Allow Notifications, choose when you want the notifications delivered — immediately or in the scheduled notification summary.

With iOS 15 and iPadOS 15, you can turn on Critical Alerts so notifications come through even if your iPhone is muted or you have a Focus set up.” Use notifications on your iPhone, iPad, and iPod touch 

We hope this helps! 

Sincerely.

Hi Mamajenx2, 

At this point, you'll want to Contact Apple Support for help.

Cheers!