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.