I don't know why my photos weren't accepted.

Don't shoot with high ISO and f22. Your lens does not provide the required quality for this opening, and noise compensation will eat up anyhow all the details you will gain. Aim for ISO100 and the longest exposure you can offer handheld, if photographing handheld. The 2 subjects can be photographed using a tripod, which gives you more options for your settings.

Be sure that your lens focuses correctly. Both of your pictures are not sharp.

The first picture also exposes many artefacts because of the noise compensation. I first thought it was a phone picture. Aiming into the sun without filters is very challenging. Even when you get great pictures from time to time, most of the time you will struggle to correct defects.

Your second picture has a challenging light situation too, as parts are in direct sunlight and others are in shadow. If you have a reflector or flash to compensate for that would help you to get better shots. Reflectors can be any white and flat panel, it does not need to be something fancy to start with.

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