Is little bit of changing exiting item should get approved?

I have seen couple of elite author changed their existing item a bit and uploaded that as a new item. Is that allowed?

Depends what the item and change was

Thanks for your reply. We have changed some feature, landing page design, added WhatsApp order feature and uploaded but reviewer rejected saying not quality standard.
Existing Item:
New Item:
Demo: / 123456 & /123456

Can you please share any suggestion what needs to improve to get this approved?