Quality issue

Look at them full size (100%) and you see, that they are full of artefacts. You can't save them for stock, but if you lower the exposure a bit, you will have nice pictures for social media.

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

If you are a generative AI contributor, please look into these instructions and follow them by the letter: https://community.adobe.com/t5/stock-contributors-discussions/generative-ai-submission-guidelines/td-p/13549435

Insufficient light causes artifacts, loss of details and noise.

Night photos are difficult even for experts with the best equipment and ideal conditions.  Until you gain more photography experience, I would stick with daytime light.  You'll get better results and have more fun. 🙂

The first also has poor composition.  The main firework is too close to the building. 

Hello!

Look at them at 100% and you`ll see they all are very poor resolution. No details, nothing in focus.

They're blurry and noisy. Did you use a tripod?