This verse here should seriously challenge anyone thinking baptism is a hard requirement for salvation
Romans 2:13 (For not the hearers of the law are just before YHWH, but the doers of the law shall be justified. 14 For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves: 15 Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another;) 16 In the day when YHWH shall judge the secrets of men by Yahusha the Messiah according to my gospel.
Clearly implies there are those who will be judged worthy that had no worldly knowledge of Christ but kept his laws in his heart.
Replying to myself to clarify. I do not mean they earned anything. I posit that G-d knows who will and would have accepted Christ and judges a heart as such. There are those who will never hear the word of G-d but would eagerly accept Christ. Those who die will be judged mercifully by G-d, I believe the Bible supports that argument.