Connected to my IPhone but no sound in airpods max

Hey Hobo05,

We'd recommend reviewing this article as it provides steps to help resolve sound issues when using headphones: If your headphones don't work with your iPhone or iPad - Apple Support

"If you can't hear any sound or if only one side of your headphones works

1. Adjust the volume with the volume buttons on your iPhone or iPad, or use the Volume slider in Control Center on iPhone or Control Center on iPad. 
2. To see if you need a replacement, try a second pair of headphones. If the second pair works, contact the manufacturer of the initial pair and ask if you need a replacement. If the second pair doesn't work, contact Apple Support. "

If that doesn't help, reach out to Apple Support for assistance here: Get Support

Thanks!