JSON-zu-C#-.NET-Record- & Class-Generator (System.Text.Json & Newtonsoft)

using System;
using System.Collections.Generic;
using System.Text.Json.Serialization;

namespace GeneratedModels
{
    public record OrderPayload
    {
        [JsonPropertyName("orderId")]
        public string? OrderId { get; init; }
    
        [JsonPropertyName("customer")]
        public Customer? Customer { get; init; }
    
        [JsonPropertyName("items")]
        public List<Item?>? Items { get; init; }
    
        [JsonPropertyName("billingAddress")]
        public BillingAddress? BillingAddress { get; init; }
    
        [JsonPropertyName("totalAmount")]
        public double TotalAmount { get; init; }
    
        [JsonPropertyName("currency")]
        public string? Currency { get; init; }
    
        [JsonPropertyName("isDelivered")]
        public bool IsDelivered { get; init; }
    
        [JsonPropertyName("deliveryNotes")]
        public object? DeliveryNotes { get; init; }
    }

    public record BillingAddress
    {
        [JsonPropertyName("street")]
        public string? Street { get; init; }
    
        [JsonPropertyName("city")]
        public string? City { get; init; }
    
        [JsonPropertyName("stateOrProvince")]
        public string? StateOrProvince { get; init; }
    
        [JsonPropertyName("postalCode")]
        public string? PostalCode { get; init; }
    
        [JsonPropertyName("country")]
        public string? Country { get; init; }
    }

    public record Item
    {
        [JsonPropertyName("sku")]
        public string? Sku { get; init; }
    
        [JsonPropertyName("name")]
        public string? Name { get; init; }
    
        [JsonPropertyName("quantity")]
        public int Quantity { get; init; }
    
        [JsonPropertyName("unitPrice")]
        public double UnitPrice { get; init; }
    
        [JsonPropertyName("discounts")]
        public List<int>? Discounts { get; init; }
    
        [JsonPropertyName("inStock")]
        public bool InStock { get; init; }
    }

    public record Customer
    {
        [JsonPropertyName("id")]
        public int Id { get; init; }
    
        [JsonPropertyName("fullName")]
        public string? FullName { get; init; }
    
        [JsonPropertyName("email")]
        public string? Email { get; init; }
    
        [JsonPropertyName("isPremiumMember")]
        public bool IsPremiumMember { get; init; }
    
        [JsonPropertyName("registeredAt")]
        public DateTimeOffset RegisteredAt { get; init; }
    }
}