Problem installing Rancher with Let´s Encrypt

Provider: K3S
Kubernetes Version: v1.19.15+k3s2
Rancher: 2.5.9

Hi,

I followed this official guide to install Rancher with Let´s Encrypt:

but when accessing to the login page the certificate is invalid.
The issuer is dynamiclistener-ca and not Let´s Encrypt.

kubectl -n cattle-system describe certificate

Name:         tls-rancher-ingress
Namespace:    cattle-system
Labels:       app=rancher
              app.kubernetes.io/managed-by=Helm
              chart=rancher-2.5.9
              heritage=Helm
              release=rancher
Annotations:  <none>
API Version:  cert-manager.io/v1
Kind:         Certificate
Metadata:
  Creation Timestamp:  2021-10-08T19:30:34Z
  Generation:          1
  Managed Fields:
    API Version:  cert-manager.io/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:metadata:
        f:labels:
          .:
          f:app:
          f:app.kubernetes.io/managed-by:
          f:chart:
          f:heritage:
          f:release:
        f:ownerReferences:
          .:
          k:{"uid":"752e1e8a-bdad-4b8a-be5e-b61d22dd0d35"}:
            .:
            f:apiVersion:
            f:blockOwnerDeletion:
            f:controller:
            f:kind:
            f:name:
            f:uid:
      f:spec:
        .:
        f:dnsNames:
        f:issuerRef:
          .:
          f:group:
          f:kind:
          f:name:
        f:privateKey:
        f:secretName:
        f:usages:
      f:status:
        .:
        f:conditions:
        f:notAfter:
        f:notBefore:
        f:renewalTime:
        f:revision:
    Manager:    controller
    Operation:  Update
    Time:       2021-12-07T19:31:40Z
  Owner References:
    API Version:           networking.k8s.io/v1
    Block Owner Deletion:  true
    Controller:            true
    Kind:                  Ingress
    Name:                  rancher
    UID:                   752e1e8a-bdad-4b8a-be5e-b61d22dd0d35
  Resource Version:        22473173
  Self Link:               /apis/cert-manager.io/v1/namespaces/cattle-system/certificates/tls-rancher-ingress
  UID:                     81efa2e6-f970-4731-95f2-3fd1815a9d7b
Spec:
  Dns Names:
    host.example.com
  Issuer Ref:
    Group:      cert-manager.io
    Kind:       Issuer
    Name:       rancher
  Secret Name:  tls-rancher-ingress
  Usages:
    digital signature
    key encipherment
Status:
  Conditions:
    Last Transition Time:  2021-10-08T19:31:40Z
    Message:               Certificate is up to date and has not expired
    Observed Generation:   1
    Reason:                Ready
    Status:                True
    Type:                  Ready
  Not After:               2022-03-07T19:31:40Z
  Not Before:              2021-12-07T19:31:40Z
  Renewal Time:            2022-02-05T19:31:40Z
  Revision:                2
Events:                    <none>

Appreciate any help, thanks!