WordPress remove comments globally

remove-comments.php

<?php
/**
 * Remove support for comments globally.
 */
function jb_remove_comment_support() {
    add_filter( 'comments_open', '__return_false' );
    add_filter( 'pings_open', '__return_false' );
    
    $post_types = get_post_types();
    if ( ! empty( $post_types ) ) {
        foreach ( $post_types as $post_type ) {
            remove_post_type_support( $post_type, 'comments' );
            remove_post_type_support( $post_type, 'trackbacks' );
        }
    }

    add_action(
        'admin_menu',
        function () {
            remove_menu_page( 'edit-comments.php' );
        }
    );
}
add_action( 'init', 'jb_remove_comment_support' );