I mean if you want to build something around Unbound to do ad blocking and set up a monitoring stack for metrics and all that jazz that’s great, more power to you. But you already have two things built for purpose, there’s no reason to go out of your way to do that. And I don’t think OP here is prepared to do all that.
Getting all the functionality of Pihole into Unbound would be a good deal more than “a little work” lol. And for no real practical reason when all you’re trying to do is set up secure DNS with some ad blocking on your network. And this is coming from a professional who wouldn’t have to “learn” anything to do it. If it was really that little work, Pihole + Unbound wouldn’t be the go-to solutions for so many people.