Apple is incredibly secretive, even to their own employees. Information is compartmentalized to incredible degrees that it is amazing that any of this works.
It is important to note that on this development board, not a single essential component on the logic board is modular. Typically one would have something like this as an expansion board where the SoC - with interface board - would slot into so development of both software and hardware can move independently. This has none of that. It is targeted solely to the Software development when the hardware is effectively already locked in. If any changes need to happen to the hardware, it's time to toss it in the bin and make a new one.
It is all secrecy and obfuscation. In much the same way why people now develop on a best in class emulator when it comes to iOS where you don't need to know anything about the hardware as it is abstracted away.
It is important to note that on this development board, not a single essential component on the logic board is modular. Typically one would have something like this as an expansion board where the SoC - with interface board - would slot into so development of both software and hardware can move independently. This has none of that. It is targeted solely to the Software development when the hardware is effectively already locked in. If any changes need to happen to the hardware, it's time to toss it in the bin and make a new one.
It is all secrecy and obfuscation. In much the same way why people now develop on a best in class emulator when it comes to iOS where you don't need to know anything about the hardware as it is abstracted away.