Enable Face ID/Touch ID/PIN option to eero app. Allows for enhanced security to router admin/settings.
There is a good reference for this - the Nintendo Switch Parental Controls app does exactly this. Within the switch app, I am able to require authentication (touch id, or a Nintendo online account) before I am able to make changes. It was a game changer in our family's relationship with our Switch, and is a good first step for eero.