Developers generally think a lot differently than the average person who winds up using their application. By nature, developers are more linear thinkers trying to develop software for a general population that is usually anything but. For that reason, embedding tutorials and creating documentation that explains how a piece of software is intended to work has become a critical component of the end user experience.
Google has released the Google Poly API which developers can use to search for, download, and use 3D objects and scenes in AR/VR applications. The API is read-only and provides a list of 3D assets with many filters such as keyword, category, asset type, popularity, and complexity.