There doesn't seem to be a clear area of focus here. The white is so bright that it takes away from the flowers to the viewer. Also your flower (the main subject) is too far away and away from the light source. Less forground and a bit more light on the subject.
The lighting is a little too flat, there are no highlights or shadows on the flowers so they don't stand out much, you could have fixed it with dodging and burning, I'm sure it would look much better. It's also a little noisy but you might have done that on purpose.
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