I designed this wireless charger to sit on my desk. It fits the Pixel Buds Pro perfectly and matches the curved aesthetic of the case.

I used this wireless board from Aliexpress: https://fr.aliexpress.com/item/1005005716095383.html?spm=a2g0o.order_list.order_list_main.10.1d4a5e5b1wOcxn&gatewayAdapt=glo2fra

This is a two parts print, the top, and the bottom. Both need support. You may get away without support for the bottom, but I did not try.

The bottom is secured to the top with three M3x8 screws, you just force them inside the holes. There is no need for threaded inserts.