themes-wordpress/block-canvas/parts/footer.html

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<div style="height:var(--wp--preset--spacing--80)" aria-hidden="true" class="wp-block-spacer"></div>
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<div class="wp-block-group"><!-- wp:group {"style":{"spacing":{"padding":{"top":"var(--wp--preset--spacing--60)","bottom":"var(--wp--preset--spacing--60)"}}}} -->
<div class="wp-block-group" style="padding-top:var(--wp--preset--spacing--60);padding-bottom:var(--wp--preset--spacing--60)"><!-- wp:paragraph {"align":"center"} -->
<p class="has-text-align-center">
            Designed with <a href="https://wordpress.org" rel="nofollow">WordPress</a>        </p>
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