The RODE Mic has a USB-C connector. An iPhone is equipped with a Lightning connector.
You will need to purchase a USB-C to Lightning adapter (or cable):
https://www.digitec.ch/de...
Apple USB-C - Lightning cable (1 m)
One more thing: I don't know if Apple has a driver for the Mic. They still have to check.
It runs on an Android phone, or with a Linux system (PiOS). There were problems with Win 10 (recognised as a speaker instead of a mic).

There is a version of the microphone for the iPhone (Lightning) and a version for Android phones (UBS C). With an adapter plug, the microphone would be mechanically unstable and prone to breaking off.