The documentation of OCP 4.6 for OSSM 1.1 describes the following for enabling the IOR:

Example istio-installation.yaml

    gateways:
      istio-egressgateway:
        autoscaleEnabled: false
      istio-ingressgateway:
        autoscaleEnabled: false
        ior_enabled: false       << This is incorrect. (for 2.x)

Documentation Link OSSM v1.x

Documentation Link OSSM v2.x

The above would not work as the NEW SMCP CR does not know ior_enabled at all. Wouldn't this be changed in the documentation for OSSM 1.x ?

As per what I understand, the documentation which ships OSSM 1.x documentation ( OCP 4.6, OCP 4.7 ) should have changes to the YAMLs and configuration sections as per OSSM v2.x control plane because the SMCP CR configures as per the NEW API structure.

NOTE: This is the one I have observed but there might be many more places in the documentation to be changed.