exactly the same configuration as you have gradients on the same element do not work.
Yes, you can do multiple layers, Yes, you can do multiple zones in a single gradient, but there is clearly some horizontal gradients in different directions, that cannot be reduced to one that overlaps or limit height.
on the other hand, if a particular figure is not a dogma (and it is, frankly, not a masterpiece), you can do similar with a horizontal gradient at one side and vertical on top. something like this:
if you try to match colors, it can be quite similar to your drawing.