Hello,
We apologize for the issue you are facing with the import tool for redirects. To access the import feature, please ensure that you have switched to Advanced Mode in Rank Math. You can do this by navigating to Rank Math SEO → Status & Tools → Import & Export in your WordPress dashboard. If the Import & Export tab is still unavailable after switching modes, there may be other issues at play.
Here’s a visual guide to help you find the Import & Export tab:

Once you have access to the Import & Export tab, scroll down to the Other Plugins section and look for the Redirections tab. Make sure to select the Import Redirections option and then click on the Import button.

If you continue to experience difficulties, please reply to this ticket with your site URL, and a human agent from our support team will assist you further. Thank you for raising this concern!
Sources:
How to Import Redirects to Rank Math SEO » Rank Math
How to Import Redirects to Rank Math SEO » Rank Math
This is an automated reply from Rank Math Support Bot. Your ticket has been assigned to a human agent and we will get back to you shortly.
Hello,
Thank you for contacting us and bringing your concern to our attention.
Please note that the import redirection is a Rank Math PRO feature. Right now, it is not available in the free version of the plugin.
For more details, you can check this URL: https://rankmath.com/kb/import-redirects/
Hope that helps and please don’t hesitate to let us know if you have any other questions.