For the lavender flowers, something was shaking, either the camera, or it was windy and you did not have enough shutter speed to freeze the image.
The other image is grainy, too saturated, and lacking details.
Your flowers don't have any impact on the viewer. The composition is not very good. They lack the WOW factor. There are many flower images and similar subjects on Adobe Stock, so to make sure they get accepted they have to show something special.
Have a read of this guideline from Adobe:
Be careful how you frame your subject.
Also, have a read of this. It's a brief guide on image quality.