Same here, both iPad and iPhone since 15.1 update. Tried all the usual, power off power on, checked all the settings 🤔

Same on my IPad. No sound notifications! Checked all the settings, hard restart. Nothing! Hopefully 15.2 will fix this!

I have this problem on my IPad. It’s a definite glitch in the program as many people are reporting the same issue. Maybe a fix with 15.2?