Lacking of parenting controls

I feel like if xfinity is going to prevent me from changing DNS on my service in my home for my devices then their parenting controls features should be much better. They should include categories and popular services to block like tiktok and adult sites. The inability to change my DNS to openDNS to protect my children from the internet filth is a terrible business practice. I suggest we get more R&D in the parenting controls if they wont allow us to change our dns.