Many fields using Miro are involved in the creation of 3D content such as industrial designers, artists, architects, etc. Having a way to embed 3D models within a Miro board would be very helpful to many professions.
The GLFT format has become more standard for sharing 3D geometry and scenes. It has been described as the “JPEG of 3D” for its efficient and interoperability between platforms. It is open-source: https://www.khronos.org/gltf/ GLTF files are viewable natively in Facebook, Chrome, etc.