Use the following code as a template for configuring multiple instances to share different links.

Using data attributes

<div>Share Page 1:</div>

<div class="a2a_kit a2a_kit_size_32 a2a_default_style" data-a2a-url="http://www.example.com/page_1.html" data-a2a-title="Example Page 1">
    <a class="a2a_button_facebook"></a>
    <a class="a2a_button_mastodon"></a>
    <a class="a2a_dd" href="https://www.addtoany.com/share"></a>
</div>

<div>Share Page 2:</div>

<div class="a2a_kit a2a_kit_size_32 a2a_default_style" data-a2a-url="http://www.example.com/page_2.html" data-a2a-title="Example Page 2">
    <a class="a2a_button_facebook"></a>
    <a class="a2a_button_mastodon"></a>
    <a class="a2a_dd" href="https://www.addtoany.com/share"></a>
</div>

<div>Share Page 3:</div>

<div class="a2a_kit a2a_kit_size_32 a2a_default_style" data-a2a-url="http://www.example.com/page_3.html" data-a2a-title="Example Page 3">
    <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 defer src="https://static.addtoany.com/menu/page.js"></script>

For details, see the full configuration example.