Did you look up the Tennessee laws? None of the parents, mother or father, is favored for custody in front of the court.
Yes, sure if the couple is unmarried the mother get the sole custody but if the father proves paternity he has a assert to his legal parental rights which is custody or parenting time. The father does not need to step away from custody because of the mother. If he will get everything what he is asking for is written in the stars.
I would never say it's easy or uncomplicated or even I am an expert. It can get messy between the parents.
But if the father really want to be involved in his child's life he can do something.
Just because it's not written in the press it doesn't mean it's not already happened in 2020 behind close doors. Johnny stays under the radar for years now. A lot of stuff could already happened.