Why Does Black Have the Advantage?

Here, black is down a pawn, has a knight on the edge of the board, and is clearly behind in development. Why does Stockfish give Black an advantage in this position?

Edit: Nevermind. The position is actually equal. But my question remains. Why is the position equal and not a +2 advantage for White?

I think you have posted the wrong position. The one you have posted surely has a slight edge for white.

Nevermind. The position is actually equal. But my question remains. Why is the position equal and not a +2 advantage for White?

Black has easy development. Theoretically, I believe, this is considered to be more or less equal. However, Black needs to know what he/she is doing, or he/she is just down a pawn. That's why I prefer the white side here...

Blank

Because black gets better development, easy space, while white still has to find a way to develop. (After the mainline bb5+). It’s not pleasant to play as white in blitz.

because COMPENSATION for the pawn is development, open lines, and white doens't.

Yes, exactly.

If you try this line out for fun (without studying it) it's easy to just be a pawn down. One of the reasons I like 3...Bc5

I think Stockfish is wrong here. In a symmetrical position as such, whoever has the first move, in this case, White can only be better. Albeit, a theoretically prepared player with the black pieces can prove the advantage is very slight, not much. 

It's a gambit line, and it's not symmetrical, WTH are you talking about?

maybe he's referring to the symmetrical position of the king and queen.

then the starting position is a draw lol

Gambit line? White has not sacrificed any material in the starting position and the piece setups are mirror images. 

omegaLUL must still be bug where the board doesnt show up for some people

2K it's the two knights