WordPress custom post status function (none for Block editor yet)

wp-post-status.php

<?php
/*******************************
 CUSTOM POST STATUS
 ******************************/
/**
 * Register custom post status.
 *
 * @return object
 */
function my_custom_post_status(){
     register_post_status( 'archive', array(
          'label'                     => _x( 'Archive', 'textdomain' ),
          'public'                    => true,
          'show_in_admin_all_list'    => false,
          'show_in_admin_status_list' => true,
          'label_count'               => _n_noop( 'Archive <span class="count">(%s)</span>', 'Archive <span class="count">(%s)</span>' )
     ) );
}
add_action( 'init', 'my_custom_post_status' );

/**
 * Add post status to Edit Post's Status select options in Publish box (Classic-only).
 *
 * WordPress does not do these (yet) by defualt:
 * @see https://wordpress.org/support/article/post-status/#custom-status
 *
 * @return void
 */
function my_append_post_status_list(){
     global $post;
     $complete = '';
     $label = '';
     if( $post->post_type == 'post' ) {
          if( $post->post_status == 'archive' ) {
               $complete = ' selected="selected"';
               $label = '<span id="post-status-display"> Archived</span>';
          }
          echo '
          <script>
          jQuery(document).ready(function($){
               $("select#post_status").append("<option value="archive" '. $complete . '>Archive</option>");
               $(".misc-pub-section label").append("'.$label.'");
          });
          </script>
          ';
     }
}
add_action( 'admin_footer-post.php', 'my_append_post_status_list' );
add_action( 'admin_footer-post-new.php', 'my_append_post_status_list' );

/**
 * Add post status to Bulk/Quick Edit's Status select in All Posts table.
 *
 * WordPress does not do these (yet) by defualt:
 * @see https://wordpress.org/support/article/post-status/#custom-status
 *
 * @return void
 */
function my_append_post_status_bulk() { // ultra-simple example
    echo "<script>
    jQuery(document).ready( function() {
        jQuery( 'select[name=\"_status\"]' ).append( '<option value=\"archvive\">Archve</option>' );
    });
    </script>";
}
add_action('admin_footer-edit.php','my_append_post_status_bulk');

/**
 * Add post-status name next to post in All Posts table.
 *
 * @see https://developer.wordpress.org/reference/hooks/display_post_states/
 *
 * @return array $states Custom post-status name or current post stati.
 */
function my_display_post_status( $states ) {
     global $post;
     $arg = get_query_var( 'post_status' );
     if( $arg != 'archive' ) {
          if( $post->post_status == 'archive' ) {
               return array( 'Archive' );
          }
     }
    return $states;
}
add_filter( 'display_post_states', 'my_display_post_status' );

/*
Reference:
https://wordpress.org/support/article/post-status/
https://developer.wordpress.org/reference/functions/register_post_status/

Based on:
https://web.archive.org/web/20181026023402/http://jamescollings.co.uk/blog/wordpress-create-custom-post-status/

List all statuses: get_post_stati() -- get_post_status() lists only WP native.
*/