Can you give me a feedback why my photo is rejected because of quality issues?

If these are AI generated graphics, you must also follow the AI submission requirements. 

https://helpx.adobe.com/stock/contributor/submit-your-content/submit-generative-ai-content/generative-ai-vector-submission-guidelines.html

Read through the illustration requirements in your Contributor User Guide. 

1. https://helpx.adobe.com/stock/contributor/submit-your-content/submit-illustrations/technical-legal-requirements-illustration-submission.html
2. https://helpx.adobe.com/stock/contributor/submit-your-content/submit-illustrations/illustration-editing-best-practices.html

A few areas that could be improved.

Some minor cutout issues. And did you label this as an Illustration rather than a Photograph when you submitted it?