Resolved the issue.The problem is somewhere between bhim app,as well as e sim, airtel and s22.In such situation just ensure to cut off 'lte' by disabling wifi and changing over to a network without 'lte' , for example 3g and 4g; without 'lte'.Rest is...
Can there be a problem with bhim app making it not recognizing messages sent from e sim vis a vis physical sim, as upi gets registered on paytm by the same e sim?