Family Settings are limited to... monitoring "health"?

I have a 7 year-old step son. He's quite bright, but doesn't always make the right decisions. I'm trying to set up a Microsoft Account for him so that he can log into the Surface that I have. However, I really need to lock down what he can do tightly, from what sites he can visit (which is more of a Chrome thing) to what apps he can use and, importantly, making sure he can't install other apps.

However, when I went to "Family Settings" it opened up my browser and gave me a page where, when I clicked "Manage Permissions" all there was was a grayed out toggle for "Allow adults in the family to monitor..."

What gives? Does Microsoft truly believe that these are the limits to what permissions I can grant to my child's account? Somehow, I doubt that. So I'm clearly missing something....

p.s. Tried opening Chrome as him. Needs permission... perfect. Except, when I click on "allow" in the email, it brings me to a Microsoft account page with no obvious approval process. Clicking the allow link does not give the permission.