Change HTTP method from frontend to backend

I have an odd situation where I have a request from a 3rd party coming into Traefik as a standard POST request with a simple body containing 2 small variables. On my backend I have a 3rd party application (in docker) installed that is expecting a GET request with the two variable as query parameters. Is there any way I can have Traefik transform the front end POST to a backend GET and move the body variables into the query? I know this won't work in all cases but in this case it's two specific variables which are small and can easily work in a GET query.

It does not sound to me like traefik is the right tool for that job.