Can we check the default value of any element in SOAP UI or ReadyApI ? Pls help me on this regard.

Could you please check the below link :-

https://community.smartbear.com/t5/SoapUI-Open-Source/I-need-to-know-if-SOAPUI-sets-default-values-for-mandatory/td-p/127554

Hope this helps to resolve your problem.

And try this also:- 

Menu -> File -> Preferences -> WSDL Settings -> then check the box for Sample Values [] Generates example values in requests when creating from schema an save the preferences.