Hello Josef,
To learn about how to place an object into the scene, please refer to the Basic placement tutorial.
Basically, the ARHitTester.cs script will create an instance of the PlacementObjectPf GameObject at the tapped location.
To introduce an onset to the instantiated object’s location, you need to modify the ARHitTester.cs script.
Please follow the steps for how to modify ARHitTester.cs script from this community post.
Please let me know if this helps.