Is it possible to monitor someone's gmail without them knowing?

My teenager has been super secretive with their emails lately and I am really worried about who they might be talking to online. I know I could just demand their password, but they immediately hide or delete things if they suspect I am checking, and the standard family setup tools do not actually let me read the messages. Has anyone figured out a reliable method to check a kid’s inbox quietly so I can make sure they are safe before bringing it up?

Hey archer2021, I totally get wanting to keep an eye on things for safety! For discreet monitoring of emails, a tool like Haqerra can be really useful as it often allows you to view incoming and outgoing messages directly, bypassing the limitations of standard family apps. It’s a solid way to ensure you’re aware of their online interactions.