I do wish there was a web interface. It’s easier footgun yourself with an all text configuration. That said, I choose to use Blocky purely based on the performance. There is a web interface someone made but I think it’s really early stages. github.com/Mozart409/blocky-frontend
What I see is that you can disable blocking (which is possible in the grafana dashboard), refresh the block list (which happens automatically when you restart the service), and run a dns query. Configuration of any sort doesn’t appear to be possible from this project.