Analyze this opening

[Event "pakbull vs magician_opponent"] [Site "Chess.com"] [Date "2025-02-19"] [White "pakbull"] [Black "magician_opponent"] [Result "0-1"] [WhiteElo "1314"] [BlackElo "1307"] [TimeControl "300"] [Termination "magician_opponent won by resignation"] 1. b3 a5 2. Bb2 h5 3. g3 Rh6 4. Bg2 Raa6 5. a3 e6 6. h3 d6 7. d3 Rf6 8. e3 g6 9. Bxf6 Nxf6 10. Nd2 Rc6 11. Bxc6+ Nxc6 12. Qe2 b6 13. Qf3 Kd7 14. Nc4 Ba6 15. Nd2 Bh6 16. Qe2 Qe7 17. Ngf3 Qe8 18. Nc4 Bxc4 19. dxc4 Ne4 20. Qd3 f5 21. Nd4 Nxd4 22. Qxd4 Qe7 23. Qd3 Qf6 24. O-O Qc3 25. Qxc3 Nxc3 26. b4 a4 27. b5 e5 28. f4 e4 29. Rf2 Bg7 30. Raf1 Ke6 31. g4 d5 32. cxd5+ Nxd5 33. gxh5 gxh5 34. Rg2 Bf6 35. Rg8 Nxe3 36. Rf2 Nd1 37. Rd2 Nc3 38. Rc8 Nxb5 39. c4 Nxa3 40. Rxc7 Nb1 41. Rc6+ Ke7 42. Rg2 a3 43. Rxb6 Bd4+ 44. Kh1 Bxb6 45. Ra2 Bd4 46. Kg2 Kd6 47. Kf1 Kc5 48. Ke2 Kxc4 0-1

can someone tell me if this opening as black already exists...

here i have it against the London system...

you may need to flip the board...