[Problem] UV Maps And More Objects

First of all , i am a beginner and I had modelled a character in maya. The body is an object and the eyes are another one and they have separate uv maps.When I import them into UE I see that they are not imported as a single mesh(the eyes are separate from the body ).Should i combine the eyes with the body to make them one object in maya? and after that what should i do with the uv maps ? I also modelled clothes and what is inside of the mouth and in the future i want to use the character for animation and also for my game.