Hi @Tima634 ,
As Joelle mentioned, there are several criteria's listed in this article here , to be considered as a private room.
If you indicate that your listing type is a room, but it doesn’t meet the requirements above, your listing may not be displayed as a room to guests – in search, in the Rooms category or otherwise. Instead, your listing may be described to guests as a Place to stay and may be found in search results for any type of place.
If you make updates to your listing to meet the requirements above, those changes may be reviewed to determine if your listing will be displayed as a room to prospective guests.