render post review content in top

add_action(
    'init',
    function () {
        if ( class_exists( 'JNews_Review_Frontend' ) ) {
            remove_filter( 'the_content', array( JNews_Review_Frontend::getInstance(), 'review_content' ), 10 );
            add_filter( 'the_content', 'custom_review_content' );
        }
    }
);


function custom_review_content( $content ) {

    if ( jnews_get_metabox_value( 'jnews_review.enable_review', false ) ) {
        $split_post = jnews_get_metabox_value( 'jnews_post_split.enable_post_split', false );

        if ( $split_post ) {
            return $content;
        }

        global $page, $numpages, $multipage;

        if ( $multipage ) {
            if ( $page === $numpages ) {
                return render_review_content( $content );
            }
        } else {
            return render_review_content( $content );
        }
    }
    return $content;
}

function render_review_content( $content ) {
    if ( class_exists( 'JNews_Review_Frontend' ) ) {
        $post_review = JNews_Review_Frontend::getInstance()->post_review();
        $content     = $post_review . $content;
    }
    return $content;
}