I would like to increase the georgraphical range of the services I am offering
I think I set it as too small at first and I would like to open it up
I don't believe there is any setting for range because they're not relevant to home-based services, which are the kind you offer. Distance only matters if *you have to travel to the client location. With boarding and daycare, the client decides whether they want to come to you, and you'll probably notice that Rover's search function doesn't help clients at all, without manipulating the map, to find nearby sitters. When people search for boarding near me, they most often receive results that can be anywhere, including ones that are far enough away as to be meaningless and inconvenient in a big city.
So you don't have to do anything.