This is the default code used to have a single AddToAny instance share the current page.

<div class="a2a_kit a2a_kit_size_32 a2a_default_style">
    <a class="a2a_button_facebook"></a>
    <a class="a2a_button_mastodon"></a>
    <a class="a2a_dd" href="https://www.addtoany.com/share"></a>
</div>

<script async src="https://static.addtoany.com/menu/page.js"></script>

You can also click "Get Button Code" on the buttons code generator to get the default code.