You've moved on to USB-C because you're ahead of the game and dream of a universal universe, but you still have lots of micro-USB devices to connect and power. Rather than buying separate cables and power supplies, why not grab one of these adapters?
The rear of this adapter has a female USB-C port for connecting your USB-C cables to, whilst the front has a male Micro-USB port for connecting/powering your micro-USB device. Handy for using your Raspberry Pi 4 USB-C power supply with your Raspberry Pi Zero.
Like all good USB things, this adapter passes both power and data.
If you want something that goes the other way, we have micro-USB to USB-C adapters in the store too.