Audio not working at all on iphone

Whenever I use the Onscripter app for umineko, it will never play a single sound. I checked the config menu and the sounds are on max. I also tried to change the audioformat thing in the ons.cfg file but still not a peep.

I'm on ios 15.3.1

Is it both with phones and without them? Also, try three-finger up swipe for unmute.