How do I stop my photos from syncing to my kid’s iPad through Family Sharing?

iPad is set up with kid’s account via Family sharing. In the kid’s photos, it’s showing several albums that I have created on my iPhone, as well as random photos I have saved from my iPhone. There is no pattern or similarity as to why those certain photos are on here and not all of them? I’m so confused

edited to add: it’s also synced all of my text messages. No contact information.

[Re-Titled by Moderator]

Original Title: ipad is signed into kids account buy syncing only *some* of my photos