Yandex Maps API. How can I change the text in the labels on the map?

Question

API

I myself have never worked with the Yandex.maps API, so there was a small gag)
There is a script:

function init () {
    // Создаем карту
    var myMap = new ymaps.Map('map', {
        center: [55.75222, 37.61556],
        zoom: 7,
    });

    // Добавляем мультимаршруты
  ymaps.vow.all([
    ymaps.route(['Москва', 'Уфа']),
    ymaps.route(['Москва', 'Сочи']),
    ymaps.route(['Москва', 'Новосибирск'])
  ]).spread(function (route1, route2, route3) {
    myMap.geoObjects.add(route1).add(route2).add(route3);
    ymaps.geoQuery(route1.getPaths()).add(route2.getPaths()).add(route3.getPaths()).applyBoundsToMap(myMap);
  });
}

ymaps.ready(init);

Result

screen

How to change the numbers 1.2 on the labels to the names of cities? And is it even possible?)

Answer 1

https://yandex.ru/dev/maps/jsbox/2.0/router