When the Kingdom of God is Established, in what manner (Physically or??) will everyone who obeys Jehovah God will become like Adam (They will no longer be males and females but all males)??

There is no direct statement in Scripture that all will become male in the Kingdom, only that there will be no marriage in the traditional sense we understand marriage. Any thinking one way or another is strictly via inference or extrapolation, which is not a "thus saith YHWH..." and needs to be understood within that context -- i.e. we cannot make dogmatic or affirmative statements