Question about AOZ1282CI

I’m trying to work out the overhead I have when drawing amps on the AOZ1282CI DC converter.
I see it’s taking the 24V/12V and supplying the board with 5V, but having trouble working out what onboard parts are using the 5V and taking up some of the 1.2A continuous output currents, as I plan to power some neo pixels from the 5v header, but don’t want to exceed the output current of the AOZ1282CI.

How is this related to OpenWrt?