Bootstrap 5 底部导航在小屏幕上不显示

问题已解决，多谢。

（小助手备注：通过 d-sm-block 和 d-md-none 实现该导航条只在小屏幕显示）

<nav class="navbar fixed-bottom navbar-light bg-light d-sm-block d-md-none">
  <div class="container">
    <ul class="nav justify-content-around">
      <li class="nav-item"> <a class="nav-link" href="#">Home</a> </li>
      <li class="nav-item"> <a class="nav-link" href="#">About</a> </li>
      <li class="nav-item"> <a class="nav-link" href="#">Services</a> </li>
      <li class="nav-item"> <a class="nav-link" href="#">Contact</a> </li>
    </ul>
  </div>
</nav>

以下为完整代码。只在手机小屏幕中显示，电脑和平板不显示。

<nav class="navbar-light bg-light fixed-bottom d-sm-block d-md-none">
  <svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
    <symbol id="home" viewBox="0 0 16 16">
      <path d="M8.354 1.146a.5.5 0 0 0-.708 0l-6 6A.5.5 0 0 0 1.5 7.5v7a.5.5 0 0 0 .5.5h4.5a.5.5 0 0 0 .5-.5v-4h2v4a.5.5 0 0 0 .5.5H14a.5.5 0 0 0 .5-.5v-7a.5.5 0 0 0-.146-.354L13 5.793V2.5a.5.5 0 0 0-.5-.5h-1a.5.5 0 0 0-.5.5v1.293L8.354 1.146zM2.5 14V7.707l5.5-5.5 5.5 5.5V14H10v-4a.5.5 0 0 0-.5-.5h-3a.5.5 0 0 0-.5.5v4H2.5z" />
    </symbol>
    <symbol id="speedometer2" viewBox="0 0 16 16">
      <path d="M8 4a.5.5 0 0 1 .5.5V6a.5.5 0 0 1-1 0V4.5A.5.5 0 0 1 8 4zM3.732 5.732a.5.5 0 0 1 .707 0l.915.914a.5.5 0 1 1-.708.708l-.914-.915a.5.5 0 0 1 0-.707zM2 10a.5.5 0 0 1 .5-.5h1.586a.5.5 0 0 1 0 1H2.5A.5.5 0 0 1 2 10zm9.5 0a.5.5 0 0 1 .5-.5h1.5a.5.5 0 0 1 0 1H12a.5.5 0 0 1-.5-.5zm.754-4.246a.389.389 0 0 0-.527-.02L7.547 9.31a.91.91 0 1 0 1.302 1.258l3.434-4.297a.389.389 0 0 0-.029-.518z" />
      <path fill-rule="evenodd" d="M0 10a8 8 0 1 1 15.547 2.661c-.442 1.253-1.845 1.602-2.932 1.25C11.309 13.488 9.475 13 8 13c-1.474 0-3.31.488-4.615.911-1.087.352-2.49.003-2.932-1.25A7.988 7.988 0 0 1 0 10zm8-7a7 7 0 0 0-6.603 9.329c.203.575.923.876 1.68.63C4.397 12.533 6.358 12 8 12s3.604.532 4.923.96c.757.245 1.477-.056 1.68-.631A7 7 0 0 0 8 3z" />
    </symbol>
    <symbol id="table" viewBox="0 0 16 16">
      <path d="M0 2a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2V2zm15 2h-4v3h4V4zm0 4h-4v3h4V8zm0 4h-4v3h3a1 1 0 0 0 1-1v-2zm-5 3v-3H6v3h4zm-5 0v-3H1v2a1 1 0 0 0 1 1h3zm-4-4h4V8H1v3zm0-4h4V4H1v3zm5-3v3h4V4H6zm4 4H6v3h4V8z" />
    </symbol>
    <symbol id="people-circle" viewBox="0 0 16 16">
      <path d="M11 6a3 3 0 1 1-6 0 3 3 0 0 1 6 0z" />
      <path fill-rule="evenodd" d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8zm8-7a7 7 0 0 0-5.468 11.37C3.242 11.226 4.805 10 8 10s4.757 1.225 5.468 2.37A7 7 0 0 0 8 1z" />
    </symbol>
    <symbol id="grid" viewBox="0 0 16 16">
      <path d="M1 2.5A1.5 1.5 0 0 1 2.5 1h3A1.5 1.5 0 0 1 7 2.5v3A1.5 1.5 0 0 1 5.5 7h-3A1.5 1.5 0 0 1 1 5.5v-3zM2.5 2a.5.5 0 0 0-.5.5v3a.5.5 0 0 0 .5.5h3a.5.5 0 0 0 .5-.5v-3a.5.5 0 0 0-.5-.5h-3zm6.5.5A1.5 1.5 0 0 1 10.5 1h3A1.5 1.5 0 0 1 15 2.5v3A1.5 1.5 0 0 1 13.5 7h-3A1.5 1.5 0 0 1 9 5.5v-3zm1.5-.5a.5.5 0 0 0-.5.5v3a.5.5 0 0 0 .5.5h3a.5.5 0 0 0 .5-.5v-3a.5.5 0 0 0-.5-.5h-3zM1 10.5A1.5 1.5 0 0 1 2.5 9h3A1.5 1.5 0 0 1 7 10.5v3A1.5 1.5 0 0 1 5.5 15h-3A1.5 1.5 0 0 1 1 13.5v-3zm1.5-.5a.5.5 0 0 0-.5.5v3a.5.5 0 0 0 .5.5h3a.5.5 0 0 0 .5-.5v-3a.5.5 0 0 0-.5-.5h-3zm6.5.5A1.5 1.5 0 0 1 10.5 9h3a1.5 1.5 0 0 1 1.5 1.5v3a1.5 1.5 0 0 1-1.5 1.5h-3A1.5 1.5 0 0 1 9 13.5v-3zm1.5-.5a.5.5 0 0 0-.5.5v3a.5.5 0 0 0 .5.5h3a.5.5 0 0 0 .5-.5v-3a.5.5 0 0 0-.5-.5h-3z" />
    </symbol>
  </svg>
  <div>
    <ul class="nav  col-12 col-xl-auto my-0 justify-content-around my-md-0 text-small">
      <li>
        <a href="#" class="nav-link text-secondary">
          <svg class="bi d-block mx-auto mb-05" width="24" height="24">
            <use xlink:href="#home" />
          </svg>
          首页
        </a>
      </li>
      <li>
        <a href="#" class="nav-link text-secondary">
          <svg class="bi d-block mx-auto mb-05" width="24" height="24">
            <use xlink:href="#grid" />
          </svg>
          工作站
        </a>
      </li>
      <li>
        <a href="#" class="nav-link text-secondary">
          <svg class="bi d-block mx-auto mb-051" width="24" height="24">
            <use xlink:href="#table" />
          </svg>
          资讯
        </a>
      </li>
      <li>
        <a href="#" class="nav-link text-secondary">
          <svg class="bi d-block mx-auto mb-05" width="24" height="24">
            <use xlink:href="#people-circle" />
          </svg>
          我的
        </a>
      </li>
    </ul>
  </div>
</nav>