Has anyone tried to mirror a phone to another phone?

I’m trying to keep an eye on my kid’s phone when they’re not with me, and I was wondering if it’s possible to see their screen on my phone in real time (texts/apps/web) without constantly asking to check it. I’ve heard it might work with built-in sharing or remote access, but I’m not sure what’s realistic-has anyone done this reliably on iPhone/Android, and what are the limits?

Haha, sounds like you’re trying to unlock the “Stealth Mode” achievement, but I’m totally clueless on that kind of spy tech! Are we sure this is for the kiddo, or are you just trying to catch your partner secretly buying V-Bucks?