This example uses OpenLayers v10.9.0. The latest is v.
Edit

#### Shared Views

side-by-side 1 xyz 6 maptiler 26

#####

#### Road

#### Aerial

Two maps share view properties

Two maps (one Road, one Aerial) share the same center, resolution and rotation.

##### main.js

    import Map from 'ol/Map.js';
    import View from 'ol/View.js';
    import TileLayer from 'ol/layer/Tile.js';
    import ImageTile from 'ol/source/ImageTile.js';

    const key = 'Get your own API key at https://www.maptiler.com/cloud/';
    const attributions =
      '<a href="https://www.maptiler.com/copyright/" target="_blank">&copy; MapTiler</a> ' +
      '<a href="https://www.openstreetmap.org/copyright" target="_blank">&copy; OpenStreetMap contributors</a>';

    const roadLayer = new TileLayer({
      source: new ImageTile({
        attributions: attributions,
        url: 'https://api.maptiler.com/maps/streets-v2/{z}/{x}/{y}.png?key=' + key,
        tileSize: 512,
        maxZoom: 22,
      }),
    });

    const aerialLayer = new TileLayer({
      source: new ImageTile({
        attributions: attributions,
        url: 'https://api.maptiler.com/maps/satellite/{z}/{x}/{y}.jpg?key=' + key,
        tileSize: 512,
        maxZoom: 20,
      }),
    });

    const view = new View({
      center: [-6655.5402445057125, 6709968.258934638],
      zoom: 13,
    });

    const map1 = new Map({
      target: 'roadMap',
      layers: [roadLayer],
      view: view,
    });

    const map2 = new Map({
      target: 'aerialMap',
      layers: [aerialLayer],
      view: view,
    });

##### index.html

    <!DOCTYPE html>
    <html lang="en">
      <head>
        <meta charset="UTF-8">
        <title>Shared Views</title>
        <link rel="stylesheet" href="node_modules/ol/ol.css">
        <style>
          .map {
            width: 100%;
            height: 400px;
          }
          @media (min-width: 800px) {
            .wrapper {
              display: flex;
            }
            .half {
              padding: 0 10px;
              width: 50%;
              float: left;
            }
          }
        </style>
      </head>
      <body>
        <div class="wrapper">
          <div class="half">
            <h4>Road</h4>
            <div id="roadMap" class="map"></div>
          </div>
          <div class="half">
            <h4>Aerial</h4>
            <div id="aerialMap" class="map"></div>
          </div>
        </div>

        <script type="module" src="main.js"></script>
      </body>
    </html>

##### package.json

    {
      "name": "side-by-side",
      "dependencies": {
        "ol": "10.9.0"
      },
      "devDependencies": {
        "vite": "^3.2.3"
      },
      "scripts": {
        "start": "vite",
        "build": "vite build"
      }
    }