Just like cURL, this is a speciality panel, designed to help you track data of the SOAP requests you make.
To activate the SOAP logging functionality you either create an instance of the included
bedezign\yii2\audit\components\SoapClient) instead of the default one (
\SoapClient) or derive from it to use as a basis for your own class.
It will take care of logging from there on.
SoapFault’s are automatically logged an error as well. A link is provided from the Soap panel to the error. No need to add this yourself.