1) What is the Islam opinion about receiving oral sex (opposite sex) not married?

2) Also, what is the Islam opinion about receiving oral sex from (same sex) is it sodomy or obscene?

3) Does receiving homosexual oral sex have the same punishment as sodomy? Like does he have to be stoned to death? Or it has a different punishment? If it has a different punishment what is it ?

1 and 2) Both are haram and forbidden.
3) No. It is not the same.
Punishment in this case is left to the judgement of the highest scholar (Mujtahid). It could be 80 beats. But don’t forget the day after punishment