field_bound_boxes sitemap

Hello, I created a box called country with the field bound boxes plugin and to it I added 6 cities that I use, the problem is that I don't see anywhere how to add it to my sitemap,

the robots.txt file says the following:

# robots.txt

User-Agent: *
Allow: /
Crawl-delay: 20

Disallow: /plugins/
Disallow: /libs/
Disallow: /includes/
Disallow: /print*
Disallow: /*?sort_by=
Disallow: /*&sort_by=
Disallow: /*?sort_type=
Disallow: /*&sort_type=

### Rules generated by the Sitemap plugin ###
Sitemap: https://www.escortspuntacana.com/sitemap.xml

# Excluded pages:
Disallow: /*confirm.html*
Disallow: /*listing-details.html*
Disallow: /*print.html*
Disallow: /404.html*
Disallow: /*listing-remove.html*
Disallow: /*country.html*