Cert-manager support for CRD IngressRoute not working as expected

As by Integration with cert-manager | Traefik | v3.4

i added this to my IngressRoute

tls:
    domains:
      - main: redacted-public-domain.tld
    secretName: whatsmyip-ingress-tls-secret

But the cert-manager will not create a certificate-request for that. I also tried to add the annotation to the IngressRoute

"cert-manager.io/cluster-issuer": "le"

As for the Ingress/NginxIngress routes, but this still does not work. It does work when i create an Ingress route (cert-manager is configured correctly).

Is it expected to somehow create the Certificate manually or am i overlooking something?

After reading my post and seeing the link title, i noticed, that the documentatino is for Traefik 3.4, while i use Traefik 3.6 - i cannot find the same documentation for Traefik 3.6 - has the cert-manager support been dropped for traefik 3.6?

Some of the docs have been re-worked lately.