Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
Could you please check if the redirects are showing in the Rank Math’s redirection?
Meanwhile, for initial troubleshooting, please click this button in Rank Math > Status & Tools > Database Tools:
https://rankmath.com/kb/rank-math-status-and-tools/#recreate-missing-database-tools
Please note that some options are only available when you enable the Advanced Mode in Rank Math. If it’s not showing, you must have chosen to use Easy Mode. Please follow the steps in this link to switch to Advanced Mode:
https://rankmath.com/kb/advanced-mode/
Once done, clear your website’s cache and try to create the redirect again.
Let us know how this goes.
Thank you.