Does rei ever discover about the suicide note in manga?

In the manga "Your Lie in April," Rei does not directly discover the suicide note. The story primarily focuses on the relationship between the main characters, Kōsei and Kaori, and the emotional struggles they face. While the note plays a significant role in the narrative, it is not revealed to Rei, and the impact of Kaori's actions is explored through Kōsei's perspective instead.