Please give critique

I can't imagine any commercial use for a toasted sandwich, with poorly masked edges, floating in a white background. Just composing it on an attractive plate with an uncluttered background would have far more appeal.

You tell us what Adobe told you, why they did not accept the picture.

Looking into the picture, I think that saturation/contrast is not correct. Your cut-out job is not perfect. You still have a small darker line around your object:

If you did submit a PNG file, did it include the transparent background?

As my last: I doubt about the commercial appeal of this image. I think that could be a refusal reason too.

If you are new to stock, you should consider these resources: https://helpx.adobe.com/stock/contributor/tutorials.html
Please read the contributor user manual for more information on Adobe stock contributions: https://helpx.adobe.com/stock/contributor/user-guide.html
See here for rejection reasons: https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
and especially quality and technical issues: https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html