My moms manage my younger siblings at the access level. Screen time is limited to a couple hours per day max, no creating social media accounts, parental controls activated on all devices (so no adding apps or visiting websites that a parent hasn't greenlit). I'm sure a sufficiently motivated and computer-minded kid could get past all of this (I did when my mom tried it on me as a teen lmao) but none of my siblings are really interested in computers at all beyond watching Kids Youtube / Netflix and texting friends so their system has never truly been tested.