Yes, as long as it is a valid .glb (GLTF 2.0) model file. Please make sure your .glb file is valid and is optimized for use on mobile devices through appropriate testing. You can even upload your own 3D model as an XR-Map environment (mapping) for using it in Virtual Reality to invite your friends, family, or colleagues.
To upload your 3D model, visit the web-based World-Editor and click on "Upload a model" via the main menu icon. Then, choose the type of your model between "Item" - to place your 3D model as an item in your XR-Maps - or "XR Map" to use it as a base environment in a new XR-Map.
After uploading your 3D model as an item, you can access it via the "Asset Manager" from the World-Editor's main menu or place it into one of your XR-Maps when when you click on the "Edit" button, then click on "My Items" button and select your item from your selected category.