Hello @Rob Ward ,
First, you need to enable Show Develop menu under Safari-> Preferences->Advanced in your MAC.
Second, you need to enable Web Inspector on iOS device.
If you debug on your real device, try to open the Settings app on your device, then go to Safari > Advanced, switch on the Web Inspector and JavaScript. If you are debugging on iOS simulator, there is only a JavaScript option, try to open it.
Then your device will appear in the Develop menu of Safari , you can build and run the app. And debug the webview such as checking the source code, adding a JavaScript breakpoint and so on.
For more details, you can refer to Safari Web Inspector Guide and Safari Developer Help.
Best Regards,
Wenyan Zhang
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