What i did in the video is the back 7 screens are the master driven by 2 3060ti cards and the top 3screens 21 inch are set as surround in nvidia cpl, which are seen as 1 screen on 1 3060, and 4 19 inch screen are individual so total screen on master pc is 5 screen (rendered screen)
Msfs is displayed windowed and stretch in wide over the screens with main on the 4 19 inch and the top screen is a created multiwindow, so 2 screen divided over 5 screens
On the second pc (wideview client ) has a 3090 with 2 24 inch monitor in surround that will be seen as 1 screen and use only main screen in msfs (so a second rendered screen)
Both pc have there own licenced copy of msfs with own xbox account
Now the client pc has all traffic sliders to 0 and no realtime or generic traffic, and no multiplayer
For there is no need for it since it is only for instrumentation and online it looks weird for people will see 2 planes on top of each other.
Both pc have there own camera and i use 1 headset for headtracking at the same time each with different settings to stay within their respective boundaries
Hope this information may fill your need to know.
Regards
Sebastiaan