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The first three photoswo have focus issues. You should have had more depth of field. When doing closeup photos use a small apperature. f/11 or higher.
The first and last photos have a halo.
They are all pretty flowers, nicely composed with good color; however, as Ralph noted focus isn't sharp enough and consistent enough in any of them due to the shallow dof. Keep in mind that there are already >23 million images in Adobe Stock with "flower" as a tag; in order for yours to be accepted into the database they must be unique and technically perfect.
Many thanks to everyone for the explanations!