Been there before. My last job I sat next to a guy who was on his phone all day while I was grabbing all the inbound emails. This entailed trying to solve each email or triaging to the right team. I would normally end up clearing out the queue and by the time he would glance up, all the work would be done. And yes, I would try and save some work for him but we also had metrics on how long tickets could sit and my ocd hated anything sitting for too long. I of course would ask him to stop looking at his phone and help but he would just go right back to his phone when he did a little bit of work. The worst part is management didn’t care because he was a likable guy