Help with technical issues

The first image has noise problems and artefacts due to the noise cancellation (missing detail structure, washed out colours). In addition, the contrast is not good enough.

The second image has noise and artefacts like chromatic aberration (arrow). It is also not very sharp.

Inspect your pictures at 100% and 200%, and you will see the defects.

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

Your images appear a little flat to me. Here I added some texture and contrast, closed the highlights and opened the shadows.

I also cropped the image to put the horizon on a thirds line.

You can decide if this is better.