What transmission system is used in the DJI Smart Controller Enterprise?

What should I do if the DJI O4 Air Unit series only shows the video transmission screen and does not display OSD information after connecting to DJI Goggles?

Can I fly a racing drone using the DJI O4 Air Unit Series at the same time as other racing drones using analogue video transmission?

What are the main differences of DJI Goggles N3 compared with other DJI goggles?