I barely ever use Apple chargers. To be honest, I don’t even own an Apple USB-C charger (ok, I do: the one that came with my 2018 iPad Pro, but it’s sitting somewhere in a drawer).
As long as I own iPhones (3G), I am using Anker or UGreen Chargers, most of the time the ones with more than just one port to charge multiple devices at once.
With my current iPhone 14 Pro Max, I am using an Anker 735 charger with 65W peak, two USB-C ports and one USB-A port.
This way, I can charge my iPhone and my watch or my iPad together, or me and my wife charge our phones simultaneously while chilling on the couch.
My Pro Max still showing 99% battery health after 14 months being charged by that Anker charger, so it’s safe to say that it doesn’t hurt your iPhone at all 😉