Granted, you could just wire the power supply to be on all the time, but it is nice to be able to turn everything off. The plan was to use the always-on 5V standby rail to drive a pair of relays.

IQonIC Works USB-C/PD power adapter IP includes components required to build an integrated programmable power supply (PPS ... linear Li-Ion battery charger core (4.2V, ±1%) designed for SilTerra ...

A mini UPS with 5V, 9V, 12V DC output and optional PoE can be used to power a WiFi access point, a broadband router, an SBC, ...