Hello, we apologize for the inconvenience you’re experiencing with the product category sitemap. The issue of product categories showing 0 images in the XML sitemap could be due to the product categories being empty or not having any images associated with them.
To include empty product categories in your sitemap, you can enable the “Include Empty Terms” setting in the product categories tab. However, we recommend caution when enabling this option, as it should only be done if you understand its implications.
If the issue persists after enabling this setting, please feel free to reply to this ticket, and a human agent from the Rank Math Support team will assist you further.
Sources:
How to Configure Sitemaps in Rank Math – Best Settings and Tips
Why Isn’t My URL Included in the Sitemap? » Rank Math
Hello,
Thank you for contacting Rank Math support, and sorry for the unexpected delays and any inconvenience that might have been caused due to that.
Can you please confirm if you are using any page builders or templates for your product category archives?
Also, please head over to your WordPress Dashboard > Rank Math > Sitemap Settings > General and make sure the option “Images in Sitemaps” is enabled:

We really look forward to hearing back from you. Thank you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.