If everything was done that needed to be done, I had no issues with my daughter spending her free time on the phone with friends at that age. And yes, phone with friends is now FaceTime. She had good grades and was on a club sport so she got a lot of physical activity. I had a certain time she had to be off for the night and didn’t let her sleep with electronics in her room in the tween years.
I remember being in middle school and being on the phone for hours with friends. It’s the same thing.