In ThemeForest, there are only 2 rejection methods. Here are the following.
Hard Reject: Here you can’t resubmit your item. Also, ThemeForest will never tell that why your item has been rejected. It means you didn’t reach the quality standard of ThemeForest. So you need more improvement.
In that case, you need to see others design and try to improve yourself.
Soft Reject: Here ThemForest will tell you that why you didn’t get the approval from them. In that case, you have an option to modify your design and coding as per there requirement and also you are eligible to resubmit your item.