If I recall, when I first started submitting images, they showed up in the "Queue" till they were processed. If they were rejected, they would no longer be there. Be assured, if they are properly cropped and the right image (I have found the wrong back to a card recently), they will be uploaded and you will be credited with the points for submitting them. (I may be wrong in all of this, but I think this was the way it was.)
Bruno
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Check my Profile page to see my 2023 Goals and my Lists of sets near completion (5 cards or less) or sets getting close (less than 100 cards missing and 75% complete).
https://www.tcdb.com/Forum.cfm/Page/B/ID/0/?MODE=VIEW&ThreadID=25745&C=0