Problems detecting fauxmoESP device on Alexa

Projects Networking, Protocols, and Devices
1

I have a problem detecting device created with this code:

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include "fauxmoESP.h"

#define WIFI_SSID "HUAWEI-B315-A5A7"
#define WIFI_PASS "MYA6BY5N9FJ"

#define LED_PIN D7
#define DEVICE_NAME "Lilypad led"

fauxmoESP fauxmo;

void wifiSetup() {
    Serial.println("[WIFI] Connecting...");
    WiFi.mode(WIFI_STA);
    WiFi.begin(WIFI_SSID, WIFI_PASS);

    while (WiFi.status() != WL_CONNECTED) {
        Serial.print(".");
        delay(300);
    }

    Serial.println();
    Serial.println("[WIFI] Connected!");
    Serial.print("[WIFI] IP Address: ");
    Serial.println(WiFi.localIP());
}

void setup() {
    Serial.begin(115200);
    Serial.println("\n--- DEVICE STARTING ---");

    pinMode(LED_PIN, OUTPUT);
    digitalWrite(LED_PIN, LOW);  
    Serial.println("[GPIO] LED pin initialized.");

    wifiSetup();

    Serial.println("[ALEXA] Initializing fauxmo...");
    fauxmo.createServer(true);
    Serial.println("[ALEXA] Server created.");

    fauxmo.setPort(80);
    Serial.println("[ALEXA] Port set to 80.");

    fauxmo.enable(true);
    Serial.println("[ALEXA] fauxmo enabled.");

    fauxmo.addDevice(DEVICE_NAME);
    Serial.print("[ALEXA] Device added: ");
    Serial.println(DEVICE_NAME);

    fauxmo.onSetState([](unsigned char device_id, const char * name, bool state, unsigned char value) {
        Serial.print("[ALEXA] Command received for device: ");
        Serial.println(name);

        Serial.print("         State: ");
        Serial.println(state ? "ON" : "OFF");

        if (strcmp(name, DEVICE_NAME) == 0) {
            digitalWrite(LED_PIN, state ? LOW : HIGH);
            Serial.println("[GPIO] LED state changed.");
        }
    });
}

void loop() {
    fauxmo.handle();
}

I have mesh devices at home, which I was told might be a problem, but now I have connected the Wemos D1 to an old router. My phone with the Alexa app is also connected to this router, and yet when I look for the device, I cannot find it. I checked the router configuration, but I don’t see any device isolation or multicast options that I can change. I’ve seen people on YouTube set it up and it was working, so I’m wondering what I am doing wrong