Learning how to stand on your own in school is good practice for doing the same thing in life. By which I’m absolutely not saying “don’t have friends” but rather, you don’t have to be like everyone else.
My kids won’t be on social media until they’re not kids anymore. If none of us take a stand, nothing ever changes.
Your kids will create hidden social media accounts that you don't know about. That's what I would have done in their situation.