PX4 vs Snapdragon Navigator(SNV)

Hi,

Qualcomm plateform PX4 and SNV both are autonomous fight control stack.Can someone clarify that PX4 is also Visual Inertial odometry(VIO) enabled or we have to build VIO for PX4 separately using Machine vision SDK and SNV SDK (ref: GitHub - ATLFlight/ATLFlightDocs: Documentation on using the Snapdragon Flight platform.).OR PX4 is totally independent of VIO.

Thanks