That will mean that you do not have the buy box on that item, especially if you are a new seller.

It will take some time to establish before you are able to get the buy box unfortunately.

These article may be useful;

Become Buy Box eligible

Becoming the Featured Offer

Amazon do state at the end of these articles..Listings that do not win the Featured Offer are eligible for placement in the More buying choices box, but note that Amazon does not guarantee placement in either of these locations.