index.php

<?php
/**
 * The main template file
 *
 * This is the most generic template file in a WordPress theme
 * and one of the two required files for a theme (the other being style.css).
 * It is used to display a page when nothing more specific matches a query.
 * E.g., it puts together the home page when no home.php file exists.
 *
 * @link https://developer.wordpress.org/themes/basics/template-hierarchy/
 *
 * @package WordPress
 * @subpackage Twenty_Twenty_One
 * @since Twenty Twenty-One 1.0
 */

get_header(); ?>

<?php if ( is_home() && ! is_front_page() && ! empty( single_post_title( '', false ) ) ) : ?>
	<header class="page-header alignwide">
		<h1 class="page-title"><?php single_post_title(); ?></h1>
	</header><!-- .page-header -->
<?php endif; ?>

<?php

  function get_page_id_by_slug( $slug, $post_type = "page" ) {
    $args = array(
      'name'        => $slug,
      'post_type'   => $post_type,
      'post_status' => 'publish',
      'numberposts' => 1
    );

    return get_posts($args)[0];
  }

  function parse_the_content ($content) {
    $content = apply_filters( 'the_content', $content );
    $content = str_replace( ']]>', ']]&gt;', $content );
    echo $content;
  }

  $angela = get_page_id_by_slug("angela");
  $amarantos = get_page_id_by_slug("amarantos");
  $chimamanda = get_page_id_by_slug("chimamanda");

?>

  <article id="angela">
    <h1 class="homepage-title">
      <?= $angela->post_title; ?>
    </h1>
    <section class="homepage-content">
    <?php parse_the_content($angela->post_content); ?>
    </section>
  </article>

  <article id="amarantos">
    <h1 class="homepage-title">
      <?= $amarantos->post_title; ?>
    </h1>
    <section class="homepage-content">
    <?php parse_the_content($amarantos->post_content); ?>
    </section>
  </article>

  <article id="chimamanda">
    <h1 class="homepage-title">
      <?= $chimamanda->post_title; ?>
    </h1>
    <section class="homepage-content">
      <?php parse_the_content($chimamanda->post_content); ?>
    </section>

<?php
/*
if ( have_posts() ) {

	// Load posts loop.
	while ( have_posts() ) {
		the_post();

		get_template_part( 'template-parts/content/content', get_theme_mod( 'display_excerpt_or_full_post', 'excerpt' ) );
	}

	// Previous/next page navigation.
	twenty_twenty_one_the_posts_navigation();

} else {

	// If no content, include the "No posts found" template.
	get_template_part( 'template-parts/content/content-none' );

}
*/

get_footer();