So I just learned that apparently Home Assistant has absolutely no user account control. My roommate has no need to access the lights, electrical outlets, etc. in my room, and has absolutely no reason to be able to see my phone’s battery charge level and charger status.
What I would do is install kiosk mode from HACS. Build a dashboard for them that only shows what you want them to see, then add kiosk mode so they can’t access the menus. Set it as their default and it should be fine