Add Reusable Blocks to WordPress

functions.php

/**
 * Reusable Blocks accessible in backend
 * @link https://www.billerickson.net/reusable-blocks-accessible-in-wordpress-admin-area
 *
 */
function be_reusable_blocks_admin_menu() {
    add_menu_page( 'Reusable Blocks', 'Reusable Blocks', 'edit_posts', 'edit.php?post_type=wp_block', '', 'dashicons-editor-table', 22 );
}
add_action( 'admin_menu', 'be_reusable_blocks_admin_menu' );