Posting about DD1 again, I am questioning myself a lot with her tm!
We have been fairly relaxed about screen times with the kids over the past few years as it would cause so many arguments. The one no negotiating rule was phones downstairs overnight, not in bedroom. Reasons being sleep, reducing social media exposure at some point of the day, things that Molly Russell's dad has said about Molly having the phone overnight etc etc.
DD1 is nearly 16 and says ALL her friends (I know I know) have their phones overnight and that she is missing all the interaction that they are having, that we are so strict etc etc. Her friends overall aren't the best influence on her, they have a lot more freedom than her.
YABU - Yes, she is maturing, has to make her own decisions, friends parents are right not to remove connection to the world outside the house
YANBU - These other parents are too lenient/turning a blind eye.