Answered
You're competing with over 11 million commercial-quality dog images.
Even if it's accepted, this will be a low-percentage sale due to so much competing inventory.
https://stock.adobe.com/search?k=dog
Not sure what commercial value your AI image would have. If this is what you submitted, the picture quality is too dark & pixelated.

This is what Stock has to say about Quality & "Similar Content."
- https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
- https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html
- https://helpx.adobe.com/stock/contributor/user-guide.html/stock/contributor/help/photography-illustrations.ug.html
- https://helpx.adobe.com/stock/contributor/help/how-to-submit-distinct-content.html
Hope that helps.
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