Hello,
Thank you for contacting Rank Math and bringing your concern to our attention.
Apologies for the delay as we currently have a high volume of tickets here in our support forums.
Yes, the canonical is added/active from the image you have shared.
Rank Math, by default, automatically adds a self-referencing canonical URL (gray text) to your site if they are set to index. So, you won’t need to fill/add the canonical URL there.
Please note that the canonical box’s purpose would be to inform search engines that it is a duplicate page and should not be indexed.
Here’s a link for more explanation on its usage:
https://rankmath.com/kb/advanced-tab/#canonical-url
Hope that helps.
Thank you.
Hello,
You’re welcome.
We are super happy that we have addressed your concern. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.