JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://api-maps.yandex.ru/2.1/?lang=ru-RU"></script>
<div id="map"/>

CSS

#map {
    width: 640px;
    height: 480px;
}
.map-icon__content {
    font: bold 18px arial;
}

JavaScript

ymaps.ready().done(function (ym) {
    var myMap = new ym.Map('map', {
        center: [55.743994, 37.622093],
        zoom: 9
    });
    
    var myPlacemark = new ym.Placemark(myMap.getCenter(), {
        iconContent: 130
    }, {
        iconLayout: ym.templateLayoutFactory.createClass('<span class="map-icon__content">{{properties.iconContent}}</span>')
    });
    
    myMap.geoObjects.add(myPlacemark);
});