>>17541321"3D Debut" is used here as a shorthand for "3D Debut event stream", which is a specific kind of stream (usually an hour long, the talent's 3D model is the main focus of the stream, often lots of cameos and call-ins, pose requests, skits, etc)
You are taking "debut" to mean "reveal", and while "debut' can indeed mean "reveal" according to the dictionary, part of understanding English is using context clues to disambiguate multiple potential meanings and select the intended one.
tldr "3D Debut (reveal)" is not the same as "3D Debut (event stream)", and you mistaking one for the other does not make her deceptive, it makes you stupid.