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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I think both of your katas were well-crafted: clear and well-written descriptions, good use of markdown, decent tests. As others pointed out, however, the topic you chose has been covered by several other kata creators before you. I would suggest unpublishing this kata to avoid downvoting, having a closer look at the JavaScript coding challenges which have already been published and redirecting your energy to create a more original kata with better odds of getting out of beta.
Too close:
https://www.codewars.com/kata/5827acd5f524dd029d0005a4
https://www.codewars.com/kata/559f860f8c0d6c7784000119
Also take a look at all of these:
https://www.codewars.com/users/PiotrBerebecki/authored
Both of your katas are uninspired garbage. Filtering, accessing object attributes etc. - all of the topics they're focused on have been covered thousands of times already. Maybe it's a duplicate, maybe it's note, I don't care: there's NO point in spamming any more of these.