It is simple! Just go to build settings and switch to android. Doesn't take that long and then build for android. Dani uses unity XR so it will work on the quest too without modifying code.
Nah it's super easy to do! Just go to build settings in unity change to android click change platform then wait around 5 minutes and then build and voila. He used unity XR so it will work for the Oculus Quest too when it's an APK. It doesn't take that long.