As of this tutorial people in the EU where having issues with the original haxserver.jar. So there's a different one for EU.
https://gbatemp.net/threads/tutorial-running-kexploit-5-5-x-w-haxserver-loadiine-homebrew-launcher-etc.424948/
EDIT; I've managed to replace the 'HaxServer.class' in this...
if they get permission from 4j (the studio who helped put minecraft on consoles), they could put the console edition tutorial worlds in the game, as seeds
and i mean all of them (if not, maybe a few highlights, like TU1, TU31, and TU69)