// Usage: getPicklistLabelsWithValues(new List<String>{'Case.Status', 'Lot__c.Type__c'})
@AuraEnabled
public static Map<String,List<Map<String, String>>> getPicklistLabelsWithValues(List<String> objectWithFieldList){
    try{
        Map<String,List<Map<String, String>>> pickListLabelsValuesMap= new Map<String,List<Map<String, String>>> ();
        for(String objectWithField : objectWithFieldList)
        {
            List<String> objectWithFieldSplitted = objectWithField.split('\\.');
            pickListLabelsValuesMap.put(objectWithFieldSplitted[1], getPicklistLabelsWithValuesValuesForField(Schema.getGlobalDescribe().get(objectWithFieldSplitted[0]).getDescribe().fields.getMap().get(objectWithFieldSplitted[1])));
        }
        return pickListLabelsValuesMap;
    }
    catch(Exception exceptionInstance)
    {
        throw new AuraHandledException(exceptionInstance.getStackTraceString());
    }
}

private static List<Map<String, String>> getPicklistLabelsWithValuesValuesForField(Schema.SObjectField field)
{
    List<Map<String, String>> labelsWithValuesMapList = new List<Map<String, String>>();
    Map<String,String> pickListLabelValueMap;

    Schema.DescribeFieldResult fieldResult = field.getDescribe();
    List<Schema.PicklistEntry> ple = fieldResult.getPicklistValues();

    for( Schema.PicklistEntry pickListVal : ple){
        pickListLabelValueMap = new Map<String,String>();
        pickListLabelValueMap.put('value', pickListVal.getValue());
        pickListLabelValueMap.put('label', pickListVal.getLabel());
        labelsWithValuesMapList.add(pickListLabelValueMap);
    }
    return labelsWithValuesMapList;
}