^^&&^^

Edit File: content-single.php

<?php
/**
 * Template part for displaying posts
 *
 * @link https://developer.wordpress.org/themes/basics/template-hierarchy/
 *
 * @package WordPress
 * @subpackage Twenty_Twenty_One
 * @since Twenty Twenty-One 1.0
 */

<div class="entry-content">
		<?php
		the_content();

wp_link_pages(
			array(
				'before'   => '<nav class="page-links" aria-label="' . esc_attr__( 'Page', 'twentytwentyone' ) . '">',
				'after'    => '</nav>',
				/* translators: %: Page number. */
				'pagelink' => esc_html__( 'Page %', 'twentytwentyone' ),
			)
		);
		?>
	</div>

<?php if ( ! is_singular( 'attachment' ) ) : ?>
		<?php get_template_part( 'template-parts/post/author-bio' ); ?>
	<?php endif; ?>

</article>