Is it possible to monitor a child's instagram activity without them knowing?

My teen just got their first phone and I am really worried about who they are talking to online, especially since they spend so much time on that photo app. I looked into some built-in screen time tools and family sharing features, but they all seem pretty obvious once you check the settings. Is there a reliable way to keep an eye on their messages and followers in the background without triggering any notifications or making them feel like I am spying on them?

Monitoring without notification is difficult and can backfire if discovered. Built-in tools are the most discreet, but they can be bypassed or removed.