Your VOXL2 mini uses a kernel variant 2.0.2 (you can see in mach.var field, in the log-in message in your terminal). This kernel is used with M0188, M0195 camera adapter boards and is not compatible with all use cases that use the older adapters and interposers liike M0135 and M0084.
Since you are using older interposers / cables, you need to switch to the original kernel, which you can do during the SDK setup (it will ask you which kernel variant to install, there are only two options).
You can also test and update your kernel without re-installing the sdk. I suggest testing first to see if you can detect all 4 cameras:
you can find the kernel in your SDK in system-image directory. the original voxl2 mini kernel is qti-ubuntu-robotics-image-m0104-1-boot.img test and update kernel instructions here : https://docs.modalai.com/voxl2-kernel-build-guide/#testBy testing the kernel you will temporarily load it into RAM and boot using the kernel, after which you can check if all cameras are detected. If you want the kernel update to persist after power cycle, you need to update it, as documented.
Alex
