, the link refers to the packages which are already available in WIX package manager either approved/or under consideration. But I want to request altogether a new package.
No if you read the page fully, you will see how to do it on that page.
Wishlist Page is the new official platform for requesting new features. You can vote, comment, and track the status of the requested features (requests from this page will be migrated to the new Wishlist soon).