How to configure server API availability for Nuxt in Kubernetes?

Question

Kubernetes

Nuxt works with SSR true. In Kubernetes it is configured via LoadBalancer + igress-controller. And then it works, BUT the real IP addresses of users do not reach the backend.

I added "loadbalancer-proxy-protocol" to igress service and

use-forwarded-headers: 'true'
  use-proxy-protocol: 'true'

In igress-controller

Now the backend receives real IPs of users, BUT SSR in Nuxt fell off - now it cannot reach the backend by public URL (on a separate domain). And curl now falls off with an error

curl: (35) Unknown SSL protocol error in connection to

How to fix it?