Using Repository Dispatch API gives me error

Hey guys, I followed lot of documents for this and tried different combination but I still get

"message": "Not Found",

"documentation_url": ""


In my Postman when I try to POST my repo api, and the workflow never gets triggered what is it that am I missing?
Followed -

and many more but still the same outcome… need Help !!

I would like to bring this up again.
Anyone knows if the repository_dispatch API is only enabled if github-actions is enabled. We are struggling to use it in GHE without actions.
According to the docs it could be used to send events to github apps as well.