This is the latest news I've seen: https://www.diyphotography.net/dxo-acquires-nik-collection-google-plans-develop/
But for now, you're probably in limbo. If Google have stopped updating it, but DxO haven't yet begun to do so ...
Easy enough to add some "rays". Add a white Solid Color layer above the gradient layer, and clip it thereto. Then invert the mask. Then with a very low opacity white brush, paint some strokes outwards from the middle of the "sun".
Can you clarify - are these the varying values you've had to use to get an exact print match each time?
Remember that numbers by themselves are meaningless - only the print comparison matters.