Sending Host header to API Gateway

Based on other reverse proxies, the Host header must be sent to aws API gateway when putting it behind a reverse proxy. See:

Is this an equivalent configuration in a dynamic conf? This does not work. Any advice is appreciated.

    path = "/dev"
    Host = ""
    rule = "Host(`my.url`) && Path(`/path`)"
    service = "tip-service"
    middlewares = ["tip-strip", "testbl"]

    url = ""

Is this not possible?