@Jens-Kuehn, no, they are automatically assembled, combined with publicly known data (OSM) if that exists, and listed in your account as private data no one else can see. Until you decide (or not) to publish it, than it becomes community data. You can add amenities and a review.
An example, if you look up Bussang on the stays page, you will see Hotel du Col de Bussang, I published that today, and you see someone else did too. These are combined into one listing.