It doesn't show any of the publicly available chargers in the state of Ohio. I don't know how many there are - I've never needed to care - but I'm pretty sure that if the local Wal-Mart has a few (and the UU church!), there are others.
Are you just looking at it zoomed out really far? It only shows a selection of chargers until you zoom in, otherwise the whole thing would just be a sea of icons.
It might also be worth noting (to others reading the conversation, if there are any) that charging stations, while not cheap enough to just ignore, are pretty inexpensive to install. The main thing is getting power to the site. If power is already available, then it can be under $1,000 to put in a station (including buying the equipment), although of course there are many more expensive options if one wants.
https://www.plugshare.com
It shows just about every publicly available charger, and many private ones as well. Each one has notes on what kind of charger it is, availability, cost, and user-submitted comments. It's really useful for EV owners, and interesting to poke around on even if you can't currently make use of them.