No sound from 3.5 mm headphone jack despite meters showing sound on all previews

Hi everyone. I’m getting no audio in my headphones when I use the headphone jack on the front of the pearl 2 for confidence monitoring. The audio is enabled and the meters show fine on the pearl 2 itself. When I plug the headphones into my mixer I also get sound. Confused and wondering if I need to somehow activate the 3.5 mm jack??? Any ideas? Thanks!

I figured it out. Apologies for the post. I had to touch the channel on the touch screen. I was trying to monitor audio from the preview of the multiple channels. Once I touched the channel and selected it individually I could hear what the monitors were displaying.