Get max_node_count in GKE Node Pool with Cloud monitoring API

Question

Problem: I cant get max_node_count from Google cloud monitoring API with stackdriver exporter in GKE.

I use GKE (created by terraform) with cloud monitoring and my own prometheus in cluster. For monitoring count of nodes i want to take count form API. Now i can get only current size of nodes in node pool with

compute.googleapis.com/instance_group

but it's compute engine level, so it hasnt got kubernetes node pool autoscaler. In GKE cloud monitoring i havent seen anything about node pool and cluster autoscaler T_T

Question: How can i get max_node_count of node pool in GKE with API? Example from TF in google_container_node_pool and i need to get 9 number.

  autoscaling {
    min_node_count = "2"
    max_node_count = "9"
  }

P.S. I found such topic but i dont believe that im first who want to monitor count of max nodes of cluster