You wanna lock in that answer good sir? The Bible teaches the whole WORLD is reconciled to God, yet not all will be saved because atonement by itself does not save in the Bible, didnt do so in the OT and doesnt do so in the new covenant it must be received. That is why Paul is beseeching people:
2Co 5:19 To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation.
2Co 5:20 Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God.