I couldn't find a mount that scratched my specific itch, being simple and wall mountable by screw. This mount will fit the HomePod safely but not super tight, it is easy to get it in and out again (just be sure it's in reach of a wall socket). I made the wall side to be 10mm so you can instead of a screw also use strong adhesive tape if you so wish.
I advise to print the area where the prongs meet the base at increased/100% infill.
The author marked this model as their own original creation.