Sorry, my bad. I do not want to take advantage of your time. The thing is that from these previous posts:
Big thanks for the code! But... why this? [http.routers.wwwsecure-catchall.tls]
Could be because traefik 2.2 was not there back then.
Isn't it a valid configuration for Traefik v.2.2.x?
I was referring to the fact that the entry point redirection was added in that version
I erroneously understood that http.routers.wwwsecure-catchall.tls could have been avoided when you use the entry point redirection... but it is exactly the contrary.
As the doc says, you need to explicitly dedicate the router to HTTPS. So, my example could work iif traefik.http.routers.wwwsecure-catchall.tls is there.