https://static.nhtsa.gov/odi/tsbs/2024/MC-11012007-0001.pdf
It has a few items on this list but about youre looking for the below portion.
Reaction Gearset Whine (Gearset One)
With variation in gear tooth finish and positional control, some customers may experience whine from the reaction
planetary gearset during light to moderate driving conditions.
Most common conditions to hear whine from the reaction gearset is in 4th and 5th gear (20-35 MPH) (32-56 KPH).
Reaction gearset is active in gears 3-6 and 8-10 so depending on severity it may be possible to hear in gears other
than 4/5.
Frequency of whine will change as transmission shifts gears due to component rotation speeds being changed.
Utilizing manual tap to shift through gears is a good way to verify what gears whine in present in.
Note: Whine from the reaction gearset should not be present in 7th gear due to the 1:1 ratio and gears being locked.
If whine is present in 7th gear, issue likely lives with some other component.