Welcome to the stock photography. Unfortunately, there are quality requirements that need to be met before the pictures are getting accepted. You need to check your pictures at 100% and 200% magnification to look for artefact and other defects that will disqualify the picture. If you post here it is useful to let us know the refusal reason.
For IMG_1655 I would guess technical reasons:
The picture contains artefacts that are typical for phone pictures or small sensor cameras. In addition with flowers it is critical to get the blossom in focus (orange arrow). Your picture had the leaves behind in focus (yellow).
As phone pictures are allowed to be submitted, they get the same vetting as other pictures taken with much better sensors.
Small sensors tend to introduce noise faster and are processing the images aggressively to overcome that deficit. That processing unfortunately introduces different defects.
Some defects may be introduced by uploading your files here, however, the pattern is very typical for your type of phone.
For picture 0442 you also have different defects:
I didn't look into the other pictures, I suppose they are similar.
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
When I take pictures a lot of them are not in-focus, even when the subject is not moving. And I'm shooting with a 5DmIV and great and sharp prime lenses. So, you need to shoot a lot.
You need to look at your pictures at 100% and/or 200% to see most of the artefacts. Some can be corrected, others not. I do not have one picture that has no correction of some kind.