A couple designs I came up with to mount my Google Home Mini to the wall. A round and an angular version. They both will hold the Home Mini on your wall, freeing up table space. Touch controls are still accessible, However, accessing the mute switch requires picking it up. Both designs are attached to the wall with a pair of #6 wood screws.
I recommend supports and a brim on the round design, just to make sure it adheres to the build plate, and the overhangs print with a decent finish. The angular model is designed to not need supports or a brim. Your mileage may vary.