PTC Vuforia has released new Unity samples for using Vuforia Engine with Magic Leap 2:
https://assetstore.unity.com/packages/templates/packs/vuforia-magic-leap-2-sample-245664
The Vuforia Magic Leap 2 Sample provides a complete Unity project showing how to design and configure Unity scenes to use Vuforia Engine targets with the Magic Leap 2, enabling you to attach content to specific objects in a Magic Leap experience.
This sample demonstrates how to configure Unity XR Settings to support Vuforia Engine apps running on Magic Leap 2. You'll also see how to design AR UIs for Magic Leap stereo rendering and inputs in different scenes supporting Image Targets, Model Targets and VuMark targets.