I have another, longer post pending approval, perhaps it was due to the links I included (never had this happen before). Perhaps my original post with more detail will show up, eventually.
My suggestions basically boiled down to: a) apply trim to give the appearance of a window without actually being a window, or b) a large circular gable vent (this was a link) in case it’s just that something’s needed to fill a blank gable area for balance, as with my first suggestion, or c) an actual window - perhaps to match another one elsewhere - that’s covered on the outside with a solar screen as opposed to a regular window screen (we have a couple of windows with these and they’re helpful), or d) a window with sun-blocking shade cloth (this was another link) inside.