to import a resource on tfstate in case of tfstate lost follow these steps:

1. Ordered List Itemfind the resource to import (in this example a cluster GKE)
   in this case we need to find the cluster name, and cluster location [ <cluster-name>,projects/<project-id>/locations/<location>/clusters/<cluster-name> ] the other requested information may change with the case
2. define the resource in a tf file, for example import.tf with the contents:
   

   resource "google_container_cluster" "resource-name" {
     name               = "cluster-name"
     location           = "location"
     initial_node_count = 1
     network            = "projects/<project-id within the network>/global/networks/<network name>"
   
     master_authorized_networks_config {
       dynamic "cidr_blocks" {
         for_each = var.master_authorized_networks_cidr_blocks
         content {
           cidr_block   = cidr_blocks.value.cidr_block
           display_name = cidr_blocks.value.display_name
         }
       }
     }
     dns_config { # forces replacement
       cluster_dns        = "CLOUD_DNS" #it depends on original creation
       cluster_dns_domain = "domain.name" #it depends on original creation
       cluster_dns_scope  = "CLUSTER_SCOPE" #it depends on original creation
     }
     timeouts { #it depends on original creation
       create = null
       delete = null
       read   = null
       update = null
     }
   }

3. importing resource issuing the command:
   

   terraform import google_container_cluster.<resource-name> projects/<project-id>/locations/<location>/clusters/<cluster-name>