The hardware is still the same as in this older post. If you have Ubuntu installed on it, you can run these commands in your home folder:
sudo apt update sudo apt install oracle-java8-jdk mkdir nukkit cd nukkit wget -O nukkit.jar https://ci.nukkitx.com/job/NukkitX/job/Nukkit/job/master/lastSuccessfulBuild/artifact/target/nukkit-1.0-SNAPSHOT.jar sudo java -jar nukkit.jar sudo nano server.properties sudo java -jar nukkit.jar
And if you are lucky, you can play.
I found better plugins for this server, and most importantly, if the Minecraft app on iPad was updated, the developers of this server responded with a working update sooner than with the PocketMine server.