MQTTNet: How to change value in topic for active client?

Question

I have a device that has a built-in mqtt client that subscribes to a broker server and displays topic 0 or 1;

• 0 - disabled;
• 1 - enabled;

MQTT Broker (ASP.NET WEB API) .Net 6

BUILDER

var optionBuilder = new MqttServerOptionsBuilder()
    .WithDefaultEndpoint()
    .WithDefaultCommunicationTimeout(TimeSpan.FromMilliseconds(5000))
    .Build();

builder.Services
    .AddHostedMqttServer(optionBuilder)
    .AddMqttConnectionHandler()
    .AddConnections()
    .AddMqttTcpServerAdapter();

builder.Services.AddMqttConnectionHandler();
builder.Services.AddMqttWebSocketServerAdapter();

APP

app.UseMqttServer(server =>
{
});

After connecting the device to the server, I want to see the status of this client on the server and send a parameter to change the topic attribute.

In version 3.. - I used the IMqttServer interface

private readonly IMqttServer _mqttServer;

        public MqttBrokerService(IMqttServer mqttServer)
        {
            _mqttServer = mqttServer ?? throw new ArgumentNullException(nameof(mqttServer));
        }

        public Task<IList<IMqttClientStatus>> GetClientStatusAsync()
        {
            return _mqttServer.GetClientStatusAsync();
        }

        public Task<IList<IMqttSessionStatus>> GetSessionStatusAsync()
        {
            return _mqttServer.GetSessionStatusAsync();
        }

        public Task ClearRetainedApplicationMessagesAsync()
        {
            return _mqttServer.ClearRetainedApplicationMessagesAsync();
        }

        public Task<IList<MqttApplicationMessage>> GetRetainedApplicationMessagesAsync()
        {
            return _mqttServer.GetRetainedApplicationMessagesAsync();
        }

        public Task<MqttClientPublishResult> PublishAsync(MqttApplicationMessage applicationMessage)
        {
            if (applicationMessage == null)
            {
                throw new ArgumentNullException(nameof(applicationMessage));
            }

            return _mqttServer.PublishAsync(applicationMessage);
        }

But in version 4.. - this interface was removed and now I don't understand how I can build messages for the client and get detailed statistics.

there is MQTTnet.Extensions.ManagedClient, but I still could not connect to the active session of my client.

var options = new ManagedMqttClientOptionsBuilder()
    .WithAutoReconnectDelay(TimeSpan.FromSeconds(5))
    .WithClientOptions(new MqttClientOptionsBuilder()
        .WithClientId("Client1")
        .WithTcpServer("192.168.1.1")
        .WithTls().Build())
    .Build();

var mqttClient = new MqttFactory().CreateManagedMqttClient();
await mqttClient.SubscribeAsync(new MqttTopicFilterBuilder().WithTopic("my/topic").Build());
await mqttClient.StartAsync(options);

I will be very grateful for your help