Did you already submit these to Adobe Stock?
As @Abambo mentioned the designs are rather simple, and too similar. The commercial appeal is lacking because anyone with a rudimentary grasp of basic editing / illustration programs can create the designs themselves rather than paying for them. Additionally, Adobe prefers not to accept assets with text in them. Again, a designer with minimal skill can add the text they want rather than shopping through the database for the specific message you've decided to include in your graphic art.
Just curious: what was the rejection reason?
They give you a rejection reason. There is no rejection without a reason.
Your creations are a bit too simple. When I want to draw straight lines, I will do that in Illustrator more easily as having your asset downloaded. You may try to submit one of your creations as a vector file. Do not submit this as a JPEG illustration.
Speaking as a Stock customer, I would't buy any of them. Sorry. I come to Stock with expectations of finding high quality assets for use in commercial projects. My reputation as a content creator depends on choices I make, too.
That said, the minimalism isn't lost on me. I get it. But as artwork goes, it does not demonstrate much graphic design skill. So for that reason, I would not re-submit these to Stock.
Keep working at it. Before you submit, compare your work with other Stock inventory to get a feel for what they accept.
Also read these links from your Stock Contributor User Guide.
Hope that helps.
THANKS FOR YOURS FEEDBACKS 💝🙏🏼. IT HELPS ME AS A THIRD PERSON VIEW OF MY CREATION SO THAT I CAN UNDERSTAND WHAT IS THE WRONG AND WHAT I NEED TO IMPROVE. AND THANK YOU VERY MUCH ONCE AGAIN 🙏🏼💝👍🏻