can someone give me some advice on how to fix this two images that were rejected?
I don't think these are fixable. If you zoom in, you will see that the focus isn't sharp and there is noise as well as artifacts. Additionally, the lighting, which looks like a flash unit aimed at the scene, is creating harsh shadows.
Thanks for your feedback!
You did not tell us the refusal reason, you should absolutly include this.
You also did not tell us hou these pictures were build. I strongly suspect some kind of rendering.
Besides the blown out highlights, the high noise level, you also have aliasing and moiré and bad background/foreground interaction with this border around the objects.
Anyhow you created these, the pictures will be judged accordingly to the standard criteria. You need to deliver clean and equilibrated images. 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
Thank you for your feedback