Designed this in Fusion 360. The base is designed to fit most phones, and the watch charging stand is modeled for a Samsung Galaxy Watch 4 charger. I have included 9 6mm diameter holes in the back of the base, for the spacing see photos. These holes are for future modularity, if you want to design something to fit there go for it.
When it comes to the wireless charger holder, I have designed it specifically for the cheap QI wireless charger that Walmart sells. It has also been designed to work with a Pixel 7 (not sure if that will cause issues for other phones). Because of that, I designed the WC holder to be bolted on with 2 M3 x6mm bolts. This allows the WC holder to be easily swapped, that way if my design doesn't work for you then design your own. I have included a STEP file to make that easier.
2 M3 x 6mm Bolts
2 M3 Nuts
Layer Height: 0.20
Infill Density: 15%
Supports: Yes
The author marked this model as their own original creation.