Is there an existing issue for this?

• I have searched the existing issues
• I have read the guide to filing a bug

Steps to reproduce

Control cupertino widgets like CupertinoCheckbox and CupertinoRadio have focusNode and autofocus, while these are missing in CupertinoSwitch.

https://master-api.flutter.dev/flutter/cupertino/CupertinoCheckbox/CupertinoCheckbox.html
https://master-api.flutter.dev/flutter/cupertino/CupertinoRadio/CupertinoRadio.html

This is blocking #126637 (switch.dart currently maintains its focus node for CupertinoSwitch when using Switch.adaptive which causes a bug)

Expected results

CupertinoSwitch has focusNode, onFocusChange and autofocus

Actual results

CupertinoSwitch doesn't have focusNode, onFocusChange and autofocus

Code sample

[Paste your code here]

Screenshots or Video

Logs

[Paste your logs here]

Flutter Doctor output

[Paste your output here]