Bootstrap 5 Dropdown caret position

Answering my own question. Use another class.

<li><a class="dropdown-item dropdown-toggle first-level-dropdown-toggle" href="#">Clouds</a>
  ...
</li>

And the class

.first-level-dropdown-toggle::after {
  position: absolute;
  left: 80%;
  margin-top: 0.7em;
}