I dont have triambal chamber in minecraft realms

Good morning, Last time i bought realms with my friends beacuse we want to support mojang and have a safe server, He told me that he can use a new option in single player when u can choose option to add Triambal Chambers, but when we do it in realms, it didnt work, I feel like i got scamed beacuse i payed 7 euros for this. Have a nice day