In the following documentation, the step to enable gateway injection for the ingress gateway is introduced.

https://docs.openshift.com/container-platform/4.13/service_mesh/v2x/ossm-traffic-manage.html#ossm-automatic-gateway-injection_traffic-management

However, it is unclear whether it is possible to also enable gateway injection for the egress gateway.

If it is possible to enable gateway injection for the egress gateway, it is necessary to explain the detailed steps to do it in the documentation.

If it is not possible to enable gateway injection for the egress gateway, it is necessary to add a note to clarify it in the documentation to prevent confusion.