One interviewer on the panel seemed checked out the entire time and I couldn't tell if I was bombing or they were just having a bad day

Three-person panel, two were engaged and asking good follow-ups, the third barely looked up from their laptop and asked one question the whole hour. Spent half the interview trying to read a room that wasn't giving me anything back instead of just focusing on my answers. Got through to the next round anyway, so I guess it didn't matter, but I wasted a lot of energy in the moment on something I had zero control over.