I opened the classic skyblock map in creative mode for some reason and I saw that the eyeblossoms are in the creative menu.

Steps to Reproduce:

1. Open a Marketplace world that hasn't been updated to 1.21.50 (e.g the Classic Skyblock or Star Wars Mash-Up world)
2. Open the Creative inventory and search for eyeblossoms

Observed Results:
Eyeblossoms appear in the Creative inventory and have an "Update" texture.

Expected Results:
Eyeblossoms should not appear.