Open the control center and see where the volume slider is. It may be all the way down.
Paul
That’s volume for headphones! Not ringtones!
Known issue throughout the thread. You can go into settings>sound and select a sound for say, new mail. Or just slide the slider volume up and down. It seems if it was 1/2 way down or so is when it would bug out. Anyway trying any of these options seems to make your sounds work again. Hopefully beta 4 coming today and will fix this issue with the system sounds.
Ah I hadn’t spotted the issue and oddly not noticed it getting text messages recently!