ya lo resolví, muchas gracias!
Hello,
Thank you for your query and we are so sorry about the trouble this must have caused.
Glad that everything has been sorted out.
When connecting a new domain to your account, you can disconnect your account by navigating to WordPress Dashboard > Rank Math > Dashboard > Help
and then simply disconnect the account by clicking on Disconnect Account.
https://i.rankmath.com/ZvEfVb
https://i.rankmath.com/OZSwOw
Once you click on Connect Now, please ensure that you’ve selected the correct account and then click on OK, Activate Now, as shown below.

After that, you can see all your connected sites here: https://rankmath.com/my-account/websites/
Hope that helps and please do not hesitate to let us know if you need my assistance with anything else.