Playto start the app on Unity.
Gameview will show a black screen - that is expected as the
Gameview tries to access the mobile AR camera which doesn't exists when running on a desktop machine.
Sceneview and drag the echo3D prefab into the hierarchy. If the API key was set correctly you should be able to see 3D assets from the echo3D console stream into Unity.
Build Settings > Player Settings > Player > Optimization, check the
Keep Loaded Shaders Alive*option.
Edit -> Project Settings -> Graphicsand includes your shader under
Build-in Shader-Settings > Always Include Shaders.
Save to assetto create a ShaderVariant file under the
File > Build Settings > Player Settings.
Player > Android Logo.
Other Settingsscroll down and change your Script Backend to
IL2CPP, and you will be able to check the
ARM64checkbox as active.