This wall mount bracket is specially adapted for the shape of Logitech MX Keys. Printing two is sufficient.

Using two Tesa Powerstrips for each bracket is sufficient as well and are strong enough for the keyboard.

Depending on your printer you don't need supports. IF you need supports, I recommend tree supports.

I tried to minimize the amount of material needed, hence the honycomb structure, to also reduce the weight of the bracket.