Hi Guy,
Thanks for getting in touch with us.
We do not recommend changing the canonical tags for category archives. It defeats the purpose of even having the category archives.
It is not recommended to do so but if you wish, you can do so from the advanced tab:
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Awesome thanks for the assistance
Hello,
We are super happy that this resolved your issue. 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.