My wife and I were at a market celebrating the local Pride Week. One booth had a display of a whole bunch of the different pride rainbow flags for different groups. (The trans flag was not among them,

but anyway...) After looking at all the flags and the labels indicating which group each one was for, she commented that they need one for women who have become lesbian due to remaining married when their husband transitioned!

I guess you would need a whole series of them: men who have become gay due to their wives transitioning. Lesbians and gays who have become straight due to their spouses transitioning. There would have to be some non-binary variations, too.
Here is a whole untapped field for graphic designers.