Hello,
I don’t see any duplicate tags? If you are seeing a duplicate canonical on AMP pages, please disable the Rank Math’s AMP module by going to WordPress Dashboard > Rank Math > Dashboard.
It should work fine afterward.
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
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.