Positional sacrifice???

Can someone help me out with this :

[App "Chessis"][Date "2023.12.30"] [White ""] [Black ""] [ECO "B24"] [Opening "Sicilian, Closed, Smyslov Variation"] [Result "?"] 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 Nd4 7. Nce2 {Opening: B24: Sicilian, Closed, Smyslov Variation} Nxe2 8. Nxe2 Bxb2 9. O-O Bxa1 {0.32 ➤ 2.23 ?MISTAKE, Best Move Was:}(b6 c4 Bg7 d4) 10. Qxa1 Qf6 {2.03 ➤ 3.16 ?MISTAKE, Best Move Was:}(f6 e5 d5 exd6) 11. e5 Qg7 {3.0 ➤ 4.09 ?MISTAKE, Best Move Was:}(Qd8 Bxc5 Ne7 Nc3) 12. Bxc5

I've been lookin into the closed sicilian a lot lately and I came across this. I'm tryna wrap my head around why Bxa1 is winning for white. Can someone help me out (preferably a master. But all help is welcome and appreciated). I wanna trully grasp and understand why white is winning so I can implement it myself. It looks like a powerful trap

Copy and pasting it in a pgn diagram here first

This is a cool idea, but it highly resembles the "Night Attack" sacrifice pattern.

Let me first address your position and then explain more of this Night Attack sacrifice.

In your position, 10. Qxa1 is threatening to win the Rook trapped on h8. There are several options, but let's continue with your mainline 10...Qf6 11. e5! Qg7 12. Bxc5 and now black's kingside development is still tangled.

12...Ne7 is logical to try and get castled, but then the e7 Knight pins itself because castling would hang the e7 Knight and moving the Knight from e7 would let the c5 Bishop control f8 and make castling through check still illegal.

If black's piece development is tangled up (as they currently are), then white has time to make progress with their own development. One idea white may try is Ne2-Nc3-Nb5 coming to d6 or c7. There appears to be several ideas, but you can mess around with the engine for those line specifics in which white has a slight advantage in them all.

Now for this Night Attack: this may also help you understand the problem of black's development. I made a video on this Night Attack, so rather than re-explain things, I'll simply share the video here:

Thanks mate

White is fully developed, black has 6 pieces on their initial squares.
Black has weakened the dark squares around his king, but his dark square bishop is gone.
Black is up an exchange, but his rooks are still in their corners.