End Gateway didn't spawn the first time

I killed the ender dragon in 1.18.2 and the end gateway didn't spawn anywhere. I searched all around the island but there is no way to find it. The only thing I can think of is that the world is an old backup of 1.17.1.

In the attachments I uploaded the End folder DIM1 in .rar format

 

How to reproduce it:

• Enter the end

• Destroy all the cristals

• Kill the ender dragon with beds, arrows and an enchanted diamond sword, the final shots are made using only the sword

• Gain all the exp and exit end
• Re-enter the End to look for the end gate

 

World seed: 6309057395054918058   (stronghold at 1365 -432)

Day 723