Disable Publish box for demo user

Post_Type.php

<?php

public function __construct() {
		add_action( 'add_meta_boxes', [ $this, 'disable_publish_box' ], 99 );
}

/**
 * Disables the publishing meta box and shows a notice in a single method.
 *
 * @since 1.0.0
 * @return void
 */
public function disable_publish_box(): void {
  if ( get_current_screen()->id === self::POST_TYPE ) {
    remove_meta_box( 'submitdiv', self::POST_TYPE, 'side' );
    add_meta_box(
      'cpsfwc-disabled-submitdiv',
      esc_html__( 'Publish' ),
      function() {
        ?>
        <div class="submitbox" id="submitpost">
          <div id="major-publishing-actions" style="background: #fff;">
            <div class="notice notice-error inline" style="margin: 10px;">
              <p><?php esc_html_e( "This action is disabled for demouser.", 'category-products-slider-for-woocommerce' ); ?></p>
            </div>
            <div id="publishing-action">
              <span class="spinner"></span>
              <input name="original_publish" type="hidden" id="original_publish" value="Update">
              <input name="save" type="submit" class="button button-primary button-large" id="publish" value="Update" disabled="disabled"
                   style="opacity: 0.5;">
            </div>
            <div class="clear"></div>
          </div>
        </div>
        <?php
      },
      self::POST_TYPE,
      'side',
      'high'
    );
  }
}