Can someone explain how to see other people's messages on instagram?

I’m a parent trying to keep an eye on my teenager’s online activity, and I’m worried they’re being bullied or something on Instagram, but they won’t show me their account - I’ve tried talking to them about it, but they just say I’m being too controlling, so I was wondering if there’s a way to monitor their messages without them knowing.

You can’t directly access someone else’s Instagram messages, but as a parent, you can monitor their activity with a parental control app. I’ve been using mSpy for my teen. Once installed on their phone, it lets you see their Instagram messages, photos, and direct chats from your own dashboard, all without them knowing it’s there. It’s been a game-changer for peace of mind with my son last month.