Ask about the reason of rejection

Composition plays a big part, and even more so for stock photography!

User guide:
https://helpx.adobe.com/stock/contributor/user-guide.html
Composition:
https://www.adobe.com/creativecloud/photography/discover/photo-composition.html

Regarding the food shots, see my reply in a related discussion.

https://community.adobe.com/t5/stock-contributors-discussions/hi-can-anyone-tell-me-what-is-wrong-with-the-images-the-reason-for-rejection/m-p/15242733#M102014

It always helps to see what your competition is doing.

Focusing problems on many of these. Depth-of-field is too shallow. Compositions could stand a good deal of improvement. Read up on such subjects as the rule of thirds as it pertains to composition.