Everyone likes to use DNS. How do I use DNS on my home network to set up my home router? It's the same problem as TLS certificates on web interfaces for infras

Everyone likes to use DNS. How do I use DNS on my home network to set up my home router? It's the same problem as TLS certificates on web interfaces for infrastructure. And the commercial solution is going to be "pay us a subscription fee so your home device can get an Internet management interface on top of all the egregious data collection".