[BUG]AKS Managed Istio Doesn't set x-forward-for

[trhumphries]

Describe the bug
A clear and concise description of what the bug is.
We use AKS Managed Istio and the x-forward-for header isn't getting set
Optional: Set the appropriate GitHub label(s) to indicate the AKS feature or area you believe your bug relates to.

Expected behavior
The client IP should be append as x-forward-for header

Environment (please complete the following information):

• Istio 1.23
• Kubernetes version 1.30.9

[trhumphries]

Note I've tried adding a Traffic Manager in from the load balancer and the XFF it adds is removed