adding internet subscription (RSS) calendar to child's iphone calendar

Can’t add subscription calendars to child’s devices Hi guys - we are using family sharing and cannot add subscription calendars to our kid's phone (for instance a school feed). Is there any way to solve for this? thanks!

The prior answer says to tap Calendar > Add Calendar, but that option isn't available on my child's (under 13) phone. I'm unable to add any RSS or feed-type calendars to the phone.