Putting two wedges in the same position and rotating one 90° is how I usually solve this, as it’s not currently a part shape option. Alternatively you could use an inner conrner wedge mesh, I imagine a lot exist publicly.
I might of made it a little unclear. Basically I’m trying to fill a corner gap so it looks better, but the problem here is that the way the cornerwedges bend is not gonna work in the way I want it to.
Then you can either resize the wedges into each other and just let it Z-fight on the back side or you can make a union by negating a CornerWedge from a cubic part, making sure they both share the same Size.
The first option can be applied to wedges that are rotated >90° but <180° to each other, but Z-fighting will appear only at the 90° angle.