you will need "Flattening and Forming"
But I can't help you any further than this because I don't have the license to use it.
You could also try to clean up yourself by cutting away the 3D corners.
Then do some cleaning where bend radii should be. As if it would be done on a straight press brake.
That means outside radius is inside radius + sheet metal material thickness. AND both radii should be concentric.
It could look like this:
Still not fully OK to my liking, but to give an impression where all this could get you:
I hope this gets you on a way.
This group is dedicated to the discussion of Sheet Metal in NX.