I am working on one of the lightning web component which will show child records based on picklist value, On parent detail page, I will have component which will fetch and display the child records but I want to show them based on picklist field, I want to group records and show them based on picklist value, on child object I have picklist field for which I need to group records based on that value
Picklistvalue1
ChildRecord1
ChildRecord2

Picklistvalue2
ChildRecord100
ChildRecord101

Picklistvalue3
ChildRecord200
ChildRecord201
I tried below apex class but just want to know whether I am on right track and also how to create LWC Component
 

public class RightTagWrapper {
@AuraEnabled
public String TagTypeName;
@AuraEnabled
public List<Shadow_Note__c> shadownotes;

public RightTagWrapper(String TagTypeName, List<Shadow_Note__c> shadownotes) {
   this.TagTypeName = TagTypeName;
   this.shadownotes = shadownotes;
}
  @AuraEnabled(Cacheable=true)
  public static List<RightTagWrapper> caseTrxMap(Id RecordId){
string caseRecordId;
        List<Root_Cause_Analysis__c> RCARecord= [select Id,Case__c from Root_Cause_Analysis__c where Id=:RecordId];
        for(Root_Cause_Analysis__c rca: RCARecord){
            caseRecordId = rca.Case__c;
        }

List<RightTagWrapper> shadowNotesTagList = new List<RightTagWrapper>();
Map<string,string> TagPickvals = new Map<string,string>();
             Schema.DescribeFieldResult fieldResult = Shadow_Note__c.Note_Tag__c.getDescribe();
             List<Schema.PicklistEntry> ple =fieldResult.getPicklistValues();
             for (Schema.PicklistEntry a:ple ){
             TagPickvals.put(a.value,a.Label);
             }

List<Shadow_Note__c> allshadownotes = [SELECT Note__c,Note_Tag__c From Shadow_Note__c 
                               WHERE Case__c =: caseRecordId AND Note_Tag__c != null ORDER BY CreatedDate ASC LIMIT 10];
List<Shadow_Note__c> shadownotestagType;
for (string str: TagPickvals.Keyset()) {

    shadownotestagType = new List<Shadow_Note__c>();

    for (Shadow_Note__c sn : allshadownotes) {
        if (TagPickvals.containsKey(sn.Note_Tag__c)) {
              shadownotestagType.add(sn);
        }                 
    }

    shadowNotesTagList.add(
        new RightTagWrapper(
           TagPickvals.get(str),
           shadownotestagType
       )
   );

}
return shadowNotesTagList;
  }
  }