Godot does not support directly any closed api, experimental technology or platform exclusive devices, but the gdnative interface allows to connect and create addons for these things without much effort (unless these need engine modifications).
Leap Motion drivers were made recently, you can get these on the asset library https://godotengine.org/asset-library/asset/215
Leap Magic is even more recent so it will take some time before users can get their hands on it to experiment and make addons/modules/etc.
Bastiaan Olij is the user and dev who works the most on AR/VR related things so you can check his youtube channel.
Also official docs, but probably better to try using 3.1 alpha or custom builds to get the most recent features and fixes https://docs.godotengine.org/en/latest/tutorials/vr/index.html