Missanderstanding about schematic

I’m trying to anderstand pcb project of Odrive.
Can’t understand how STM32 powers from DC.
STM32 powers by VCC which taken from LDO U3 powered by 5V.
But 5V doesn’t has any relations with DCBUS. What a magic?)
Could someone explain me please how 5V powers by DCBUS?
I’m designing single motor design based on Odrive pcb.