Salesforce4U

We can not straight forward map relationship filed from apex to LWC data table. When we get query results related object information comes  as different object itself. So we need to traverse the query results and map the way we want to. Hers is your controller method @AuraEnabled (cacheable= true )      public   static   List < Associated_Healthcare_Center__c > getAssociatedFacility( Id  sLeadId, Id  sAccountId){              return  [ SELECT  id, Signature_Healthcare_Center__c , Signature_Healthcare_Center__r .phone__c,                   Signature_Healthcare_Center__r . Facility_Short_Name__c ,                   Signature_Healthcare_Center__r . Admission_Director__r . Name     ...