Camarray Max FPS and Video processing

Hi everyone,

I’m looking to determine if the camarray is sufficient for my project. I’m looking at running this board on a rpi4:

Will I be able to receive 1080p @ 30fps from both cameras at the same time? Or will it be 640x1080 horizontally compressed?

If the horizontal compression option is the only option, can I simply stretch the image by 2 horizontally to get 2 full 1080p streams in post processing?

Is there a way to synchronize 2 separate camarray modules so that I would have 4 cameras running on 2 separate Rpi’s?