If you're in Cincy there's Metro bus, and TANK bus in northern Kentucky comes up into Cincy as well. You can also buy combo passes that let you ride both. It's admittedly a very lacking public transit system, especially after cuts made in the Covid era, but it's there and gets me to and from work.

Unfortunately the doomed underground rail system has such an infamous reputation that the thought of getting such a system put in place these days is a far fetched dream.