Which charging cable is compatible with iPhone 16 Plus?

Well, your iPhone 16 port requires a USB-C connector, so you will need that type of connector on one end of the cable.

We don't know what type of connector that your charger requires though.....do you know?

Does the port on the charger look exactly like the port on your iPhone 16? If yes, you need a USB-C to USB-C cable.

Or, is the port on your charger significantly larger than the port on your iPhone 16? If yes, you need a USB to USB-C cable.

Generally a cable with USB-C connectors at both ends.

What you don’t need to do is spend extra money on a “high-power” charging cable (e.g. 240 Watts)

Just about any quality USB-C terminated cable will suffice for the relatively low-power charging needs of your iPhone.