This has 5 parts: the Switch mount, the controller clamp, the arm (the one in photo is the 40mm) and 2 bolts. Mount and clamp need supports, try to not add supports at the clip part of the clamp.
Features:
Inspire by: https://www.thingiverse.com/thing:4351778
Thank you for the f3d file from https://www.printables.com/model/415383-gulikit-kingkong-2-pro-controller-phone-holder
Caveat:
Note: STEP files added for you to modified.
Update 2023/07/17: update the Switch mount to remove some slacks
The author marked this model as their own original creation.