iPhone not connecting Wi-Fi 6

The iPhone 14 does not support Wi-Fi 6.

You may wish to try the general Wi-Fi troubleshooting tips given here:

If your iPhone or iPad won't connect to a Wi-Fi network - Apple Support

Otherwise you may wish to contact Apple Support directly:

Contact - Official Apple Support

Yes it does support wifi 6

Straight from Apple:

All models

5G (sub‑6 GHz and mmWave) with 4x4 MIMO7

Gigabit LTE with 4x4 MIMO and LAA7

Wi‑Fi 6 (802.11ax) with 2x2 MIMO

Bluetooth 5.3

Ultra Wideband chip for spatial awareness8

NFC with reader mode

Express Cards with power reserve

reserve

iPhone 14 Pro Max - Technical Specifications

There is no setting for wifi 6, the phone automatically detects any compatible wifi network and connects to it.

The wifi indicator also does not reflect what version of wifi you are connected to.

D'oh - that's what I get for working on future stuff in my day job as I conflated Wi-Fi 6 with 6E, which of course is only supported on iPad Pros at the moment:

Use Wi-Fi 6E networks with Apple devices - Apple Support

You are of course correct, sorry about that.

It happens.

We all misread stuff now and again.