Your choices are to file back in Fla or have KY take over case if child has been there at least 6 months. Fla keeps jurisdiction until it is moved to another court. It never goes to the new state of father unless child lives there too.
Can you do this out of court? Will he allow visits in KY supervised or at a public place. Meet at a park and she stays there but you take child and play or library or restaurant? See child a few hours each day you are there and start a relationship. Mail packages. Skype phone calls and use social media to make contact depending on age of child.
You still have the supervised time that FLA gave you so what does that say ? You can send a letter to ex telling her you would like to start up the
supervised parenting time again and see what she says. How old is child?