I encourage parents to talk to their kids about online safety but specifically come up with a plan. I’ve written this in a few comments, but u really believe it helps.

Ask them what they do if a stranger says something that makes them scared or uncomfortable. Ask them what they would do if it’s someone they know like a friend or a family member. Help them come up with a plan and identify a person who is a safe person to tell. Someone parents and kids trust, often it’s an aunt or uncle.

A parent is fine too, but at a certain age, I find kids seem to be afraid of getting in trouble or maybe just uncomfortable talking to their parents about sex, so having a 3rd party that the kids and parents trust is a good back up option.