Hello,
Thank you for contacting the support, and sorry for any inconvenience that might have been caused due to that.
The bulk editing via CSV is only possible with the Rank Math PRO subscription.
Here is an article from our Knowledge Base that will give you more information on it:
https://rankmath.com/kb/editing-seo-meta-at-scale/#csv
We hope this information helps. Please let us know if you need help with anything else.
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.