Event loop flipped inside out with IAsyncEnumerable

AsyncEnumerableQueue.cs

using System;
using System.Collections.Generic;
using System.Text.Json;
using System.Threading.Tasks;
using Microsoft.Azure.ServiceBus;

namespace ConsoleApp60
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var client = new QueueClent(connectionString, BasicQueueName, ReceiveMode.PeekLock);

            await foreach (var message in client.GetQueueEnumerable())
            {
                try
                {
                    if (message.Label != null &&
                        message.ContentType != null &&
                        message.Label.Equals("Scientist", StringComparison.InvariantCultureIgnoreCase) &&
                        message.ContentType.Equals("application/json", StringComparison.InvariantCultureIgnoreCase))
                    {
                        var body = message.Body;

                        JsonElement scientist = JsonSerializer.Deserialize<JsonElement>(body);

                        lock (Console.Out)
                        {
                            Console.ForegroundColor = ConsoleColor.Cyan;
                            Console.WriteLine(
                                "\t\t\t\tMessage received: \n\t\t\t\t\t\tMessageId = {0}, \n\t\t\t\t\t\tSequenceNumber = {1}, \n\t\t\t\t\t\tEnqueuedTimeUtc = {2}," +
                                "\n\t\t\t\t\t\tExpiresAtUtc = {5}, \n\t\t\t\t\t\tContentType = \"{3}\", \n\t\t\t\t\t\tSize = {4},  \n\t\t\t\t\t\tContent: [ firstName = {6}, name = {7} ]",
                                message.MessageId,
                                message.SystemProperties.SequenceNumber,
                                message.SystemProperties.EnqueuedTimeUtc,
                                message.ContentType,
                                message.Size,
                                message.ExpiresAtUtc,
                                scientist.GetProperty("firstName").GetString(),
                                scientist.GetProperty("name").GetString());
                            Console.ResetColor();
                        }
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("Exception: \"{0}\"", ex.Message);
                }
            }
        }
    }
}

Today.cs

public void RegisterCallback(Func<Item, Task> callback)
{
    while (true)
    {
        try
        {
            var item = await DequeueAsync();
            await callback(item);
        }
        catch (Exception ex)
        {
            DeadLetter(ex);
        }
    }
}

Tomorrow.cs

public IAsyncEnumerable<Item> GetQueueAsyncEnumerable()
{
    while (true)
    {
        var item = await DequeueAsync();
        yield return item;
    }
}