How often Salvation is discussed without mentioning it is a more powerful argument. It doesn't occur in Romans 10 when Paul declares "All who call upon the name of The Lord shall be Saved", and plenty of similar places. (Same
The Gospel of John does not use the word Repent, or Repentance or any other form of the word even once. Some argue that everything we need to know to be saved in the Gospel according to John, based on how it ends. To me for any of the four to lack reference to Repentance would be odd if it was necessary for Salvation.
It never occurs in James epistle, or Jude's and only once in Peter's two epistles. And it is a rare occurrence in Paul's Epistles. Only showing up Twice in Romans, a few times in 2nd Corinthians and Hebrews. When something doesn't show up until a 2nd epistle to the same recipient, that usually means it was a lower priority.
Romans is called the definitive
That's the thing, people claim they believe salvation is by faith alone not works, but still Preach that you need to Repent to be saved. Repentance is a work, most of God's commands are commands not to Sin, even not Sinning is a work.
"And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house." - Acts 16:31
"But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness." - Romans 4:5
"Therefore we conclude that a man is justified by faith without the
"For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast." - Ephesians 2:8,9
It's also never brought up in the account of how the Ethiopian Eunuch is saved in Acts 8.
Repentance is something we should be doing, after we're saved, as part of our walk with Christ. But it's not necessary for salvation, and we won't lose Salvation by failing to do it, but we still ought to do it.