Heh (in the EU at least) the div container has a `has-reject-all-button` class.

    <div id="onetrust-button-group-parent" class="ot-sdk-columns has-reject-all-button ot-sdk-two">
        <div id="onetrust-button-group">
            <button id="onetrust-accept-btn-handler">
              Accept All
            </button>
            <button id="onetrust-reject-all-handler">
              Essential Cookies Only
            </button>
            <button id="onetrust-pc-btn-handler" aria-label="Show Purposes, Opens the preference center dialog">
              Show Purposes
            </button>
        </div>
    </div>

Would be funny if the button was merely hidden outside of the EU xD