iPhone hardware

Directly, you can plug that into a USB-C power adapter or even a USB-C computer port. Apple makes several, but there are decent ones made by other companies.

If you have any USB-A power adapters, a USB-A socket to USB-C receptacle adapter can be used. Something like this one (just an example as this one is really expensive):

https://poly.scene7.com/is/image/plantronics/c-to-a-usb-adapter

Or possibly purchase "Made for iPhone/iPad/iPod" (MFi) USB-A to Lightning cables for use with existing USB-A power adapters.

you can use any of the various ac chargers you wish really

iPhone Chargers - Apple