Retrieve K8s Ingress Load Balancer IP (not hostname) using Terraform?

I need to retrieve K8s Ingress Load Balancer IP (not hostname) using Terraform.

I've tried this:

kubernetes_ingress.mytestapp-backend-ingress.status.0.load_balancer.0.ingress.0.ip

But it was blank/null. 'hostname' field has a valid hostname available, but then it is a 'name', non-resolved, which is not acceptable to the domain.target resource, which requires an IP.

The ingress I've used:

resource "kubernetes_ingress" "mytestapp-backend-ingress" {
   wait_for_load_balancer = true
   metadata {
     name = "mytestapp-backend-ingress"
     annotations = {
       "kubernetes.io/ingress.class" = "nginx"
     }
   }
   spec {
     rule {
       host = "myapp.com"
       http {
         path {
           backend {
             service_name = "mytestapp-backend-service"
             service_port = 8080
           }
           path = "/"
         }
       }
     }
   }
 }

The domain to be configured with IP from LB/ingress:

resource "linode_domain_record" "mydomain_record_all" {
     domain_id = linode_domain.mydomain-domain.id
     record_type = "A"
     target = kubernetes_ingress.mytestapp-backend-ingress.status.0.load_balancer.0.ingress.0.ip
}

If using "hostname" (instead of "ip") will error because 'hostname' is invalid IP address, as Terraform output shows:

linode_domain_record.mydomain_domain_record_all: Creating…
Error: Error creating a Linode DomainRecord: [400] [target] Invalid IPv4 or IPv6 address

How should I be handling this?

Thanks!

Update: On Digital Ocean, I was told the IP field is populated properly, if yes, it would make this a Linode specific problem. [I'll try to replicate this there.]

I was able to workaround problem by using the 'dns provider', as:

data "dns_a_record_set" "ingress-lb-ip" {
  host = kubernetes_ingress.mytestapp-backend-ingress.status.0.load_balancer.0.ingress.0.hostname
}

resource "linode_domain_record" "mydomain_domain_record_www" {
    domain_id = linode_domain.mydomain-domain.id
    name = "www"
    record_type = "A"
    target = data.dns_a_record_set.ingress-lb-ip.addrs.0
}

Ideally Linode should be adding IP to ip field. I don't understand why the 'ip' field is not populated by Linode.

@linode Care to explain why ip field is not populated?