Apex Class for getting dynamic picklist values from object setting

auraController.js

{
  getDataPicklist: function(cmp) {
    cmp.set("v.showSpinner", true);
    var action = cmp.get("c.picklist_values");
    action.setParams({
        object_name: "Opportunity",
        fieldNames: cmp.get("StageName") // ["StageName"]
    });
    
    action.setCallback(this, function(response) {
        var state = response.getState();
        if (state === "SUCCESS") {
            console.log(response.getReturnValue());
            cmp.set("v.StageOptions", response.getReturnValue()[0]);
        } else {
            console.log("error");
            cmp.set("v.showSpinner", false);
        }
    });
    $A.enqueueAction(action);
  },
}

lwcController.js

import picklist_values from "@salesforce/apex/Utility.picklist_values";

updateActionPlans({
  object_name: "Opportunity",
  fieldNames: ["StageName"]
})
  .then((result) => {
      if (result) {
        console.log(result);
      }
      this.error = undefined;
    })
  .catch((error) => {
      console.log(error);
      this.error = error;
  });

Utility.cls

public with sharing class Utility {
    
    /*
     * picklist_values method
     * @Descrition
     * Method used to get a list of picklist values from a given object and fields 
     * @params
     * object_name - String
     * fieldNames - List<String>
     * @return
     * List<List<String>> which each position corresponds to the picklist values of the given field
     */
    @AuraEnabled
    public static List<List<String>> picklist_values(String object_name, List<String> fieldNames) {
        List<List<string>> t = new List<List<String>>();
        List<String> types = new List<String>();
        List<String> typesValues = new List<String>();
        //List<String> field_names = new List<String>{'Billing_Method__c','Billing_Day_Of_Month__c','Exp_Date_Month__c'};
        types.add(object_name);
        Schema.DescribeSobjectResult[] results = Schema.describeSObjects(types);
        for(Schema.DescribeSobjectResult res : results) {
            for(String field : fieldNames){
                List<String> values = new List<String>();
                //system.debug(field);
                for (Schema.PicklistEntry entry : res.fields.getMap().get(field).getDescribe().getPicklistValues()) {
                    if (entry.isActive()) {
                        values.add(entry.getValue());
                    }
                }
                //system.debug(values);
                t.add(values);
            }
        }
        return t;
    }
}