There's a lot of ways to do sun shading. Old tractors had an umbrella.
There was a guy, I think on TBN, that made a simple wood rectangular frame and stapled canvas on it, another guy used plywood.
Function is basically the same.
I like the way some are bent on the edges to provide more rigidity as well as being a rain gutter. You can still get pretty wet in a blowing rain trying to get back to the barn if you don't keep your eye on the clouds sometimes.
I've rode many a mile raking hay under an umbrella...... sure beats nothing on an August afternoon....... still use it on the 3000 ford that is the rake tractor.
Hard Canopy is much better for a multipurpose rig.