Unity & Swift Simple project

We have an existing AR app that was built in Unity and utilizes AR Kit. We are trying to invoke it from a button push in a partner's iOS (Swift) app. It must be a full encased version of our app that only gets loaded in their app when a button it pushed. No pre-loading. Here are requirements: - Complete insertion of a simple Unity built AR Kit scene into an iOS Swift app. The Unity built scene should not boot until a button is pushed within the iOS Swift app. The Unity built scene should boot without crashing the iOS app. - Written instructions of the steps used to complete this and any modifications to build parameters to ensure there is no conflict between the Unity AR Kit framework and the iOS app it is inserted into.