>>109760498In the show we've seen Steven being locked out, or locking others out of his/Rose's/Pink's/other's room(s) in the temple. Certain rooms can only exist when the fusion gem is around, etc.
And that was just in Rose's temple. Maybe all the of Diamonds have their own little hide away that only the individual can access; they really may not have been able to get to the garden where Spinel was because the only person who can open the door was for all intents dead. Presumably anybody can leave the room/garden from the inside, otherwise Spinel would have been really stuck there for eternity.
And since all the Diamonds were, frankly, pretty terrible and self absorbed over Pink's "death" (I mean, just look at Blue) that they just legit forgot about Pink's playmate and or didn't have proper justification to try to find her.
Pink dies, they have to glass her planet, none of them really get over it. Then "Rose Quartz" shows back up but it's really Steven who's really Pink-- Clearly they had other shit on their minds.
