I'm trying to delete an custom extension which i created for emailotp

I'm trying to delete an custom authentication extension which i created for email otp.

I have seen similar issues raised by others for deleting custom authentication extension for attribute collection, unlinking it from user flows worked but in this case there is no option to link or unlink the email otp extension, i couldnt find it under userflows nor in custom auth extension.

Help me in deleting this.

Below is the error message i received.
Cannot delete custom extension xxxxxxx-dc55-4595-bb81-2376317fcaa6: The custom extension is in used by the listener of id 01565c76-7216-42fd-96d2-xxxxxxxxx

Custom extension id is understandable, but not sure what is the listener of id refers to.