Q.Why Does My Pacific Sunset Maple Tree Not Turn To Fall Colors?
I have a newly planted Pacific Sunset Maple tree (2020) which has experienced great growth, but for the second year, it has produced no fall color. I chose this tree for its potential fall color, so I am disappointed. I understand the drought might be a facotor here in Sioux Falls, SD.

Certified GKH Gardening Expert
Cold weather and/or a drought can affect the fall display. These articles explain how fall color happens:
https://www.gardeningknowhow.com/ornamental/trees/tgen/fall-leaf-life-cycle-why-do-leaves-change-colors-in-the-autumn.htm
https://harvardforest.fas.harvard.edu/leaves/factors
https://www.purdue.edu/fnr/extension/fall-color-dud/