In that case, you'll need a USB-C to HDMI adapter. Connect the AV Adapter to your iPhone. Connect the HDMI cable to the AV Adapter. You will see the port on the adapter where the HDMI cable needs ...

The Studio Display will be supported too, obviously. Another tidbit from Apple’s support document: You can connect your iPhone to an HDMI display or TV with a USB-C to HDMI adapter or cable. Adapters ...