Hello, we apologize for the inconvenience you’re experiencing with changing the page title for product categories in Rank Math. It seems like there might be a conflict causing this issue, especially since you can change it in one WooCommerce instance but not in the other.
To troubleshoot this, we recommend checking for any conflicting plugins or themes that might be causing the issue. Additionally, you can try disabling other plugins temporarily to see if the problem persists.
If the issue continues, please assign this ticket to our support team using the available button, and we will investigate further to help you resolve this.
Sources:
General Tab in Meta Box of Rank Math SEO Plugin
How to Optimize a Category Page » Rank Math
Why Can’t I Enter More Than 1 Focus Keyword in Post and Product Categories? » Rank Math
Rank Math ‘Titles and Meta’ Options and Settings
Bulk Editing Options in the Rank Math SEO Plugin
Hello,
Thank you so much for getting in touch. I understand you want to edit the page title for each product category. I will share steps on how you can do this.
1. Go to Rank Math > Titles and Meta
2. Scroll down and click on Product > Product categories
3. Scroll down to Add SEO Controls and toggle it on

4. Save the settings
After this, you should be able to change the title of your product category.
However, if you already have the SEO controls and you can’t save the changes you have made, please follow this guide instead: https://rankmath.com/kb/meta-data-not-saving/
Looking forward to helping 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.