Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
The auto redirect option is only for the posts currently. For your attachment please enable the option to redirect attachments if you wish for them to redirect to their attached posts or homepage for the unattached files.
To perform actual redirections of one attachment redirection to a different attachment URL, you will need to add the relative redirection in Rank math > Redirection
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.