The independent city split belongs in your URL structure, not just your about page
St. Louis city and St. Louis County are separate governments, and an owner searching about one has no interest in reading about the other.
Most management sites carry a single page called service areas with a list of names under it. The list ranks for nothing and tells an owner nothing about whether you take their address.
Split the tree first. A parent page for the City of St. Louis, a parent page for St. Louis County, then children for the places you actually work: the Central West End, Tower Grove and Dogtown on one side, Kirkwood, Webster Groves, University City and Maplewood on the other.
Each child page needs something only a firm working that ground would write. The housing types you manage there. What a typical turn looks like. What you charge to lease and to manage. Rules and practice differ between jurisdictions and change, so describe how you operate and point owners to the municipality for anything binding.
The tree also qualifies for you. An owner in Ballwin who reads a page written for Ballwin arrives on the phone already knowing whether you are a fit, which is worth more than a position.