I'm looking for a tutorial for a Villager breeder that works on a Minecraft server with version 1.14.4.
Here is a tutorial.
Good tutorial
Tip for next time: Just search for a tutorial on YouTube…
Can this be done on a 1.14.4 server
Since it says 1.15, it will probably also work for 1.14. If you want German tutorials, I can only recommend the "iOser100" channel. He uploaded a tutorial to almost all Minecraft farms.
In my 1.14 world I have already built a breeder of his that works 1a: