Can you have just part of your app use ARCore and still be installable on devices that don't support ARCore? I don't want to have 2 releases to solve this issue. I want the ARCore 'level' to be part of the app and other parts not require ARCore.
Yes, you can if you specify that AR is "optional" and not "required". See https://developers.google.com/ar/develop/unity/enable-arcore#ar_optional
Awesome! Thanks. That is exactly what I was looking for. That is a relief. I have a physics game that I wanted to allow an ar level to be unlocked, but I still wanted to release for other devices.