The Blueberry is listed twice in the creative menu (Use the search bar).
It's also called "Blueberry Bush" instead of just blueberry or blueberries, unlike Sweet berries which are named Sweet berries.
Imo, the latter term "blueberries" works better with the vanilla naming scheme and the current texture.

Related: Blueberries are both in the food category as well as the blocks category