Show multiple ads within paragraph wordpress

functions.php

//Insert ads after n paragraph multiple ads
add_filter( 'the_content', 'prefix_insert_post_ads' );
function prefix_insert_post_ads( $content ) {
    $ad_code1 = '<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-5327211893729632"
     crossorigin="anonymous"></script>
<ins class="adsbygoogle"
     style="display:block; text-align:center;"
     data-ad-layout="in-article"
     data-ad-format="fluid"
     data-ad-client="ca-pub-xxxxxxxxxxxxxxx"
     data-ad-slot="xxxxxxxxxxxxx"></ins>
<script>
     (adsbygoogle = window.adsbygoogle || []).push({});
</script>';
	$ad_code2 = $ad_code; //you can add more adsense code here
    if ( is_single() && ! is_admin() ) {
    //you can add multiple condition here
		$content = prefix_insert_after_paragraph( $ad_code1, 3, $content );
		$content = prefix_insert_after_paragraph( $ad_code2, 6, $content );
		$content = prefix_insert_after_paragraph( $ad_code1, 9, $content );
		$content = prefix_insert_after_paragraph( $ad_code1, 12, $content );
		return $content;
		}
		return $content;
}
  
// Parent Function that makes the magic happen
function prefix_insert_after_paragraph( $insertion, $paragraph_id, $content ) {
    $closing_p = '</p>';
    $paragraphs = explode( $closing_p, $content );
    foreach ($paragraphs as $index => $paragraph) {
        if ( trim( $paragraph ) ) {
            $paragraphs[$index] .= $closing_p;
        }
        if ( $paragraph_id == $index + 1 ) {
            $paragraphs[$index] .= $insertion;
        }
    }
    return implode( '', $paragraphs );
}