This is a wall stand for my Ipad & sits on an angle.
These files make a stand with angle mirrored to photo and no cut out for tiles

Made this wall bracket for the wife to watch cooking videos.

The two supports go through the three sides but take note that one support is at 10degs and goes in on an angle. I glued these in. Then hang on bracket & screw to wall. Good luck :-)

PS I have put my openscad file in as well just in case you want to modify