We use vuforia fusion in our app, although for ARCore enabled devices it only works if the user installed ARCore on their device.
Most people don't know that their device might support ARCore.
There is a way with ARCore SDK to check if the device has the plugin installed, if it can install it or update it or not.
I don't know if this is only related to unity
Is there any way to do the same in vuforia so that we can direct the user to download ARCore or explain why his device can only use image targets?