A couple years ago, on another site, I was criticized for studying not just the first five books and calling it "Torah Study". In retrospect:

Rom 15:4 BSB For everything that was written in the past was written for our instruction, so that through endurance and the encouragement of the Scriptures, we might have hope.

Paul did not consider his own writings scripture, but:

2Ti 3:16 BSB All Scripture is God-breathed and is useful for instruction, for conviction, for correction, and for training in righteousness,

ALL scripture is Torah/instruction.