CCS/AWR1843BOOST: BSS power on

Part Number:AWR1843BOOST

Tool/software: Code Composer Studio

Look at the picture above with the red lines,The callback function does nothing,Please look at the picture below.

I also know that the rlDriverInit() function opens the BSS&MSS mailbox, but the rlDevicePowerOn() function does not have an API to communicate with the BSS. How does it notify the BSS of a power-on request?