Journal of Budaya, Sastra dan Bahasa / ResearchGate.
It concludes that Mendes employs a "narrative style" of writing, using persuasive lines and specific rhythmic repetitions to reinforce emotional meaning and link contrasting ideas. Key Thematic & Musical Context Shawn Mendes - Fallin' All In You
To supplement your research, you can look into these documented aspects of the song: Shawn Mendes: Fallin' All In You Chords | PDF - Scribd Journal of Budaya, Sastra dan Bahasa / ResearchGate
This paper uses a qualitative stylistic approach to identify nine types of linguistic repetitions (such as alliteration, assonance, and internal rhyme) within Mendes' lyrics. Journal of Budaya