HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>replaceChildren transfer</title>
  <style>
    main { display: flex; gap: 16px; align-items: flex-start; }
    select { width: 140px; }
  </style>
</head>
<body>
  <main>
    <div>
      <label for="no">No</label>
      <select id="no" multiple size="5">
        <option>Apples</option>
        <option>Oranges</option>
        <option selected>Grapes</option>
      </select>
    </div>
    <button type="button" id="btn">Transfer to Yes</button>
    <div>
      <label for="yes">Yes</label>
      <select id="yes" multiple size="5">
        <option>Bananas</option>
      </select>
    </div>
  </main>
  <pre id="out">—</pre>
  <script>
    document.getElementById("btn").addEventListener("click", function () {
      var yesSelect = document.getElementById("yes");
      var selected = document.querySelectorAll("#no option:checked");
      var existing = document.querySelectorAll("#yes option");
      yesSelect.replaceChildren(...selected, ...existing);
      document.getElementById("out").textContent = yesSelect.options.length + " options in yes list";
    });
  </script>
</body>
</html>

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Element.replaceChildren — transfer options (Try It)