Update 9/30/2023:
Modified to be one piece and added a few screws in the center

Will update in future to reduce the material on the back piece with hexagons or some other design.
After mounting, you don't need to use the middle screws as the side ones give more than enough strength.

Quickly remixed model from https://www.printables.com/model/284134-eibos-easdry-skadis-holder by https://www.printables.com/@karagoal to allow screw-mounting to a wall.
I added about 15mm of space between the wall and dryer to allow the fan to still move air.
Will probably update and make the countersink slightly wider for the screws. Will also most likely update to make it one piece. I think it will make it easier to mount and should add some rigidity to it as well.

VoxelPLA PLA+

.20 mm

15% infill

#8x1 ¼" screws, whatever length needed for the thickness of your mounting material will work

Quickly remixed model from https://www.printables.com/model/284134-eibos-easdry-skadis-holder by https://www.printables.com/@karagoal to allow screw-mounting to a wall.