Spore blossom isn't hidden in creative inventory even though it won't be obtainable in Caves and Cliffs part 1 (we're at the pre-releases stage and it's still not obtainable in survival, vanilla worlds). This is inconsistensy issue with sculk sensor, which has been removed from the creative inventory.

Unless its existance on lush cave biome, which doesn't naturally generate yet and can be only accessed via one of the single biome world types (should be looked into as well?) is considered "being obtainable", this should be considered a valid report.