
Stevn, the question you should be asking is how is there a crowd here?
Blue and Yellow didn’t call ahead. Nobody should be expecting Pink Diamond to return to homeworld. So how did they know to show up here? It’s got to be White. How did she know to set up a welcoming party?
I suspect White had one of her Sapphires predict. White seemed to already know that Pink wasn’t dead, judging from how she reacts to Steven, so if she relayed that information to her Sapphires, they should have been able to predict it, especially if White knew that Blue and Yellow were travelling to Earth.