In reply to C**********.

Normani's highest charting ONLY and SOLO song
Motivation- peaked at number 33

Chloe highest charting solo song
Have mercy- peaked at number 27

Solo billboard entries
Normani- 1 (motivation)
Chloe- 2 (have mercy, treat me)

Chloe solo career- 9 months old
Normani solo career-6 years old

As I said, chloe is already surpassing normani. Its only a matter of time before she surpassed normani fully.