Can I just say again to OP and to all who think it is fine for kids to have phones over night.
This is AGAINST the recommended esafety advice given out by EVERY SINGLE organisation involved with children and esafety.
Both my kids secdonary school had parents eveneings for new starters, year 7, and almost begged us as parents to remove devices at bedtime.
It is not confiscating their property, it is saying now is the time to put them away. Just as when you come in from playing football, the ball goes away and doesn't get kicked around the bedroom, so, at bedtime the phones go down stairs.
regardless of whether or not you agree or disagree with the OP, please can I ask you to consider the advice of ALL child agencies, and make is a general policy in your homes to remove tech from bedrooms at night.
We are sometimes so trusting of our own kids, that we actually do them no kindness by overtrusting them. They are safer with their phones downstairs. Yes, this is a matter of good parenting, surely at some point we can take expert advice and say, hands up, I didn't know that it was better to do this, I will change what happens in my house to improve my parenting. I have done that, it is hard, it causes more arguments, but I believe the experts that this is better for my kids.
That still leaves plenty of room for compassion, for understanding visiting children etc, but there are other ways to ensure that happens.