Once in the End, fly to the center (X 0, Z 0) and check if the End Fountain is there. If it isn't, retry. If it is, we're good to go. If your Server already has the Dragon defeated, do so in the singleplayer world too. Now once the Dragon is dead and the Portal is lighted, close the game.
Udisen Show and you can learn how to fix popular problems wuth nether portal in Minecraft Java Edition 1.20.x, 1.19.x, 1.18.2, 1.17.1, 1.16.5, 1.15.2, 1.14.4
The end portal block is a block generated when an end portal or exit portal is activated, which teleports the player between the Overworld and the End. In Java Edition, the end portal block cannot be obtained as an item. It can be placed only by using block placement commands such as /setblock, or simply by building End portals. In Bedrock Edition, it may be obtained as an item via inventory

The End is where you fight the dragon to "finish" the game. But it's not really the end. How do you find the end portal? In this video, I show you how to fin

The Transportation Nether portal is 3x3. The Transportation Overworld portal is 9x9. And both portals for the villager breeder are the regular 2x3. Thanks in advance to anyone who helps! Edit: Added a word Edit 2: I think I solved it! All I did was move the Villager Breeder Nether Portal to a lower Y coordinate Setting Up All the Necessities. The first thing that you have to make absolutely sure of is the fact that you are doing the basics right. For example, you need to absolutely ensure that the portal is 3×3 blocks large. This means that you’ll have to somehow get your hands on 12 different end portal frame-blocks. N. . 223 140 205 8 261 317 116 270 154

minecraft end portal not working