My T used to use his laptop all the time during session until I told him it bothers me. I knew he used it to take notes and that did not bother me but he would constantly be clicking otherwise and I asked him what he was looking at. He said he was going through old notes to find when I was having the same situation last. He then stopped using it and only took naps on a sheet of paper each session until we went to virtual visits.
Now he is starting to do it again. I said something again and today he pushed himself well back from the screen. I have to admit he does know everything I have said and quotes things from years ago so I guess it helps him somewhat except he usually has not been on the computer when he comes up with these quotes.