Invocablemethod Not Creating Records in Apex Class

Question

I'm new to Apex, but when I split out the class I made below and run it separately in an executable window, everything seems to work ok, but when I run it from within a flow, the records don't appear to be produced at all. The techniques for deleting records appear to work, but neither of the methods for creating records appears to work.

public without sharing class CreateQuoteProducts_NewOrRenewal{
    @invocableMethod
    public static void DeleteQuoteProductsMRF(List<Id> OrderId){
        List<Quote_Product_MRF__c> QuoteProductsMRF = [SELECT id from Quote_Product_MRF__c WHERE Order__c in : OrderId];
        if(!QuoteProductsMRF.isEmpty()){
            delete QuoteProductsMRF;
        }
    }
    public static void DeleteQuoteProductsOTF(List<Id> OrderId){
        List<Quote_Product__c> QuoteProductsOTF = [SELECT id from Quote_Product__c WHERE Order__c in : OrderId];
        if(!QuoteProductsOTF.isEmpty()){
            delete QuoteProductsOTF;
        }
    }

/* ---START--- Create Quote Products MRF ---START--- */

    public static void CreateQuoteProductsMRF(List<Id> OrderId){
        List<AggregateResult> nrqpmrfOP = [
        SELECT

        count(Id) ct,
        Order__c ord,
        sum(Total_Monthly_Recurring_Fees__c) stmr,
        sum(Monthly_Recurring_Fees__c) mr,
        sum(Discount_MRF__c) dmr

        FROM Order_Location_Package__c
        WHERE Order__c in : OrderId AND Package__r.Monthly_Recurring_Price__c != null
        GROUP BY Package__c, Order__c];

        List<Quote_Product_MRF__c> nrqpmrf = New List<Quote_Product_MRF__c>();
        for(AggregateResult ar : nrqpmrfOP){

        Quote_Product_MRF__c QuoteProductMRF = New Quote_Product_MRF__c();
        QuoteProductMRF.Quantity__c = (Decimal)ar.get('ct');
        QuoteProductMRF.Order__c = (String)ar.get('ord');
        QuoteProductMRF.Total_Monthly_Recurring_Fees__c = (Decimal)ar.get('stmr');
        QuoteProductMRF.Monthly_Recurring_Fees__c = (Decimal)ar.get('mr');
        QuoteProductMRF.Discount_MRF__c = (Decimal)ar.get('dmr');
        QuoteProductMRF.Product_Type__c = 'Package';

        nrqpmrf.add(QuoteProductMRF);
        }

        Insert nrqpmrf;
    }
/* ---END--- Create Quote Products MRF ---END--- */

/* ---START--- Create Quote Products OTF ---START--- */

    public static void CreateQuoteProductsOTF(List<Id> OrderId){
        List<AggregateResult> nrqpmrfOP = [
        SELECT

        count(Id) ct,
        Order__c ord,
        sum(Total_One_Time_Fees__c) stmr,
        sum(One_Time_Fees__c) mr,
        sum(Discount_OTF__c) dmr

        FROM Order_Location_Package__c
        WHERE Order__c in : OrderId AND Package__r.One_Time_Price__c != null
        GROUP BY Package__c, Order__c];

        List<Quote_Product__c> nrqpotf = New List<Quote_Product__c>();
        for(AggregateResult ar : nrqpmrfOP){

        Quote_Product__c QuoteProductOTF = New Quote_Product__c();
        QuoteProductOTF.Quantity__c = (Decimal)ar.get('ct');
        QuoteProductOTF.Order__c = (String)ar.get('ord');
        QuoteProductOTF.Total_One_Time_Fees__c = (Decimal)ar.get('stmr');
        QuoteProductOTF.One_Time_Fees__c = (Decimal)ar.get('mr');
        QuoteProductOTF.Discount_OTF__c = (Decimal)ar.get('dmr');
        QuoteProductOTF.Product_Type__c = 'Package';

        nrqpotf.add(QuoteProductOTF);
        }

        Insert nrqpotf;
    }
/* ---END--- Create Quote Products ORD ---END--- */

}

@isTest
private class CreateQuoteProducts_NewOrRenewalTest {

    private static testMethod void doTest() {

        Account testAcc  = new Account ();         
                testAcc.Name = 'Test Account';
                testAcc.Primary_Vertical__c = 'Multifamily Housing';
                testAcc.Total_Locations_Owned_Managed__c = 1;

                insert testAcc;

        Opportunity testOpp  = new Opportunity ();
                testOpp.Name = 'Test Opportunity';
                testOpp.AccountId = testAcc.Id;
                testOpp.Opportunity_Source__c = 'Sales Generated';
                testOpp.Type = 'New';
                testOpp.StageName = 'Contract';
                testOpp.Number_of_locations_for_opportunity__c = 1;
                testOpp.Amount = 0;
                testOpp.Implementation__c = 0;
                testOpp.CloseDate = System.today() + 5;
                testOpp.Deal_Confidence__c = 100;

                insert testOpp;

        Package__c testPackage  = new Package__c ();
                testPackage.Name = 'Test Package';
                testPackage.Package_Type__c = 'Website Package';
                testPackage.Status__c = 'Active';
                testPackage.One_Time_Price__c = String.ValueOf(200);
                testPackage.Monthly_Recurring_Price__c = String.ValueOf(100);

                insert testPackage;

        Order_Sheet__c testOrder  = new Order_Sheet__c ();
                testOrder.Opportunity__c = testOpp.id;

                insert testOrder;

        Order_New_Location__c testOrderLocation  = new Order_New_Location__c ();
                testOrderLocation.Order_Sheet__c = testOrder.id;
                testOrderLocation.Name = 'Test Location';

                insert testOrderLocation;

        Order_Location_Package__c testOrderPackage  = new Order_Location_Package__c ();
                testOrderPackage.Order__c = testOrder.Id;
                testOrderPackage.New_Location_Name__c = testOrderLocation.Id;
                testOrderPackage.Package__c = testPackage.Id;

                insert testOrderPackage;

/* --- Delete Quote Product MRF Test --- */

        Test.startTest();
        /* --- Create Quote Product MRF--- */
        Quote_Product_MRF__c testQPMRF  = new Quote_Product_MRF__c ();
                testQPMRF.Order__c = testOrder.id;

                insert testQPMRF;

        /* --- Run Delete Method--- */
        CreateQuoteProducts_NewOrRenewal.DeleteQuoteProductsMRF(new List<Id>{testOrder.id});

        /* --- Query for QP OTF--- */