Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
I’ve tried checking a random post on your site, and there’s only one category showing in the URL.
However, to include the primary category of the post on the URL, please head over to Rank Math > Titles & Meta > Posts and select the Categories as Primary Taxonomy.

Once done, you can select the category of the post as primary:

I hope that helps.
Thank you.
Hi Reinelle,
thanks for your really quick reply!
If you go to the homepage, you will see one big featured post. There it shows two categories. That’s the only place I will show two categories, cause it’s a featured post.
I tried your solution, but it didn’t work.
Thanks in advance,
Wessel
Hello,
Can you please confirm if your issue is regarding this:

If yes, then this is something that is managed by your theme. You can get in touch with the support of your theme and ask them to make the changes to only show the rank_math_primary_term
for the categories in the frontend of your posts.
Hope this helps. Let us know if you need any other assistance.
Yes. That’s exactly it.
The person who made the theme isn’t exactly very well-spoken. Isn’t there any solution from you guys? Maybe a (paid) custom one?
Thanks,
Wessel
Hello,
I’m sorry but we don’t offer customization to your theme at the moment. This type of request is outside Rank Math and you might need to find an expert to modify this theme for you since the theme author is not active.
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
That’s unfortunate! But I did found another solution, not through categories but through the tags function.
Thanks for your quick replies though,
Wessel
Hello,
Glad that you have already found another solution for this issue.
Please feel free to reach out to us again in case you need any other assistance.
We are here to help.
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.