I was playing on my survival world searching for elytras, I've found an end ship and on the Minecraft fandom (https://minecraft-archive.fandom.com/wiki/End_Ship) there is nothing according to the dragon head having a chance to spawn.
This happened in my survival world, world download: https://www.mediafire.com/file/q2k8a5iturwskdv/Survival.zip/file
Coordinates: 2156, 74 (the End)
If any more information is needed, feel free to ask.
Environment
Operating system: Windows 11
Java version: Java 21.0.3
Hardware:
Intel i7-10700F
GTX 1660
That is MC-152094. Very unlucky generation.