Hello,
We apologize for the issue you are facing with your Rank Math PRO subscription not showing in your account. This can happen if you have used a different email address for purchasing the PRO version than the one currently associated with your Rank Math account.
To resolve this, please ensure that you are logged in with the correct email address. If you confirm that you are using the correct email and still do not see your subscription, we recommend contacting our support team to merge both accounts or change the email connected to your PRO account.
You can open a ticket by navigating to the Rank Math Support Forum and providing the necessary details, including the email address you used to purchase the PRO plan.
Thank you for raising this concern, and we hope to assist you in resolving it soon!
Sources:
I Purchased Rank Math PRO but Rank Math is Still Showing FREE » Rank Math
How to Ensure Your Account Has an Active Subscription » Rank Math
Hello,
Thank you for your query and we are so sorry about the trouble this must have caused.
Assuming that the Free and PRO versions are already installed on your website, please reconnect the website with the correct account to fully utilize all the features.
Please reconnect the website to your Rank Math account and then clear the Rank Math Transients by going to Rank Math > Status & Tools > Database Tools > Remove Transients:

If the issue persists, we might need to take a closer look at the settings. Please edit the first post on this ticket and include your WordPress & FTP logins in the designated Sensitive Data section.
Please do take a complete backup of your website before sharing the information with us.

It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:
https://wordpress.org/plugins/temporary-login-without-password/
You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/
We really look 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.