Hey I’m also new but I’d love to help out if I can, was there a reasoning/message regarding the rejection? If there was, could you post it for context. Thanks!
" Thank you for your submission. We have completed our review of “Bootstrap 4 Modal & Form Design” and unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again."
It’s lacking premium value - it wouldn’t be hard to find a free css modal online and you won’t get feedback on items that are a long way off the standard
You need to:
polish the demos (endless colours of the same thing is just distracting)
provide different demos eg those with media, forms, text, gallery, video, etc