OK, for context, none of us have Graphene, Lineage, Murena, etc compatible phones. However, at work, we use an MDM that let's me manage Apple and Google devices result. I see they offer a free tier for <25 devices (I would be under that limit for desktops, laptops, and mobiles) and I know they can deploy apps without a Google account. So maybe that's the trick! Deploy my kids phones with someone I can easily track, where they can't disable location, can't install social media apps, and no need for A Google account.
I understand a Google account is needed for the MDM, but I would make up a bogus one, lock down app permissions quite well, etc. Have a kid profile and a grown up profile for when devices are registered. Seems like it'd be a rather simple thing overall that gives way more control than Google family does.
Anyone else run something like this? This would be Endpoint Central. I know they're India based, but to me that's a bonus as it's not US tech either!
Edit: oh yeah and should help to bypass age verification limits too since it'll be "corporate owned"