Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
The strip category base option only applies to category pages, the link that you shared is a page and thus this option would not work. I can suggest that you create a new page with the desired link and then redirect the old page to the new permalink using the redirections module.
Looking forward to helping you. 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.