If you ordered black & white conversion or copies - the black & white images will either be rated 5-stars, or in a separate Collection named 'B&W'.
If you'd like to see all images (both color and B&W), just click 'All Photographs' in the Catalog tab! Both the Collections and Catalog tabs can be found in the Navigator panel on the left side of your Lightroom catalog.
If you are still not seeing your B&W images after following these instructions, please reach out to customer support with some screenshots of what you're seeing so they can assist you further!