Loadbalancer via HTTPS?

Traefik Traefik v2
1

Hi :wave: ,

I'm trying to use loadBalancer with a HTTPS entryPoint (with File provider).
Eg: I would like to be redirect from https://subdomain.example.foobar.io to mydomain.io

A part of traefik.yml file

...
entryPoints:
  http:
    address: ":80"

  https:
    address: ":443"

A part of config.yml file

http:
  routers:
    traefik:
      rule: "Host(`subdomain.traefik.foobar.io`)"
      service: "api@internal"
      tls:
        domains:
          - main: "foobar.io"
            sans:
              - "subdomain.*. foobar.io"

    extension:
      rule: "Host(`subdomain.example.foobar.io`)"
      service: "my-service"

  services:
    my-service:
      loadBalancer:
        servers:
          - url: "mydomain.io"

This works for http://subdomain.example.foobar.io but not for https://subdomain.example.foobar.io
I have 404 page not found (even if I replace mydomain.io by àhttps://google.com`).

Do you have any suggestion about this ?
Thank you in advance for your help