We have promotional text (text A) that we want to embed into in article (text B) at specific different points, e.g. at 25% or 50% etc. The problem is, after adding it, text A is not displaying in text B.
The code was done by a developer who we can’t reach. It’s a WordPress snippet code in PHP.
Not sure if this explanation makes sense, feel free to ask clarifying questions.

Here is the coding that we have:
add_filter( ‘the_content’, ‘move_custom_content_in_the_main_loop’, 1 );

function move_custom_content_in_the_main_loop( $content ) {
// Only proceed if it’s a single post and the main query.
// Note: Removed in_the_loop() check as it may not behave as expected with Elementor.
if ( is_singular() && is_main_query() && get_the_ID() == 21197 ) {
// Retrieve ACF field values.
$acf_value = get_field( ‘kies_promosie’ );
$acf_value_2 = get_field( ‘kies_promosie_2’ );
$acf_value_3 = get_field( ‘kies_promosie_3’ );

    // Split the content into paragraphs.
    $paragraphs = preg_split( '/</p>/', $content );
    $total_paragraphs = count($paragraphs);
    $insertions = 0;

    // Ensure there are paragraphs to work with.
    if ($total_paragraphs > 0) {
        // Insertions for each ACF field if they have values.
        if ( $acf_value ) {
            $first_position = max(round(0.25 * $total_paragraphs) - 1 + $insertions, 0);
            array_splice( $paragraphs, $first_position, 0, '<p>' . do_shortcode( '[elementor-template id="8471"]' ) . '</p>' );
            $insertions++;
        }

        if ( $acf_value_2 ) {
            $second_position = max(round(0.5 * $total_paragraphs) - 1 + $insertions, 0);
            array_splice( $paragraphs, $second_position, 0, '<p>' . do_shortcode( '[elementor-template id="16315"]' ) . '</p>' );
            $insertions++;
        }

        if ( $acf_value_3 ) {
            $third_position = max(round(0.75 * $total_paragraphs) - 1 + $insertions, 0);
            array_splice( $paragraphs, $third_position, 0, '<p>' . do_shortcode( '[elementor-template id="16316"]' ) . '</p>' );
        }

        // Reconstruct the content.
        $content = implode( '</p>', $paragraphs );
    }
}

return $content;

}

add_filter( ‘the_content’, ‘move_custom_content_in_the_main_loop’, 1 );

function move_custom_content_in_the_main_loop( $content ) {
// Only proceed if it’s a single post and the main query.
// Note: Removed in_the_loop() check as it may not behave as expected with Elementor.
if ( is_singular() && is_main_query() && get_the_ID() == 21197 ) {
// Retrieve ACF field values.
$acf_value = get_field( ‘kies_promosie’ );
$acf_value_2 = get_field( ‘kies_promosie_2’ );
$acf_value_3 = get_field( ‘kies_promosie_3’ );

    // Split the content into paragraphs.
    $paragraphs = preg_split( '/</p>/', $content );
    $total_paragraphs = count($paragraphs);
    $insertions = 0;

    // Ensure there are paragraphs to work with.
    if ($total_paragraphs > 0) {
        // Insertions for each ACF field if they have values.
        if ( $acf_value ) {
            $first_position = max(round(0.25 * $total_paragraphs) - 1 + $insertions, 0);
            array_splice( $paragraphs, $first_position, 0, '<p>' . do_shortcode( '[elementor-template id="8471"]' ) . '</p>' );
            $insertions++;
        }

        if ( $acf_value_2 ) {
            $second_position = max(round(0.5 * $total_paragraphs) - 1 + $insertions, 0);
            array_splice( $paragraphs, $second_position, 0, '<p>' . do_shortcode( '[elementor-template id="16315"]' ) . '</p>' );
            $insertions++;
        }

        if ( $acf_value_3 ) {
            $third_position = max(round(0.75 * $total_paragraphs) - 1 + $insertions, 0);
            array_splice( $paragraphs, $third_position, 0, '<p>' . do_shortcode( '[elementor-template id="16316"]' ) . '</p>' );
        }

        // Reconstruct the content.
        $content = implode( '</p>', $paragraphs );
    }
}

return $content;

}