Cannot append nested block

[combsbj]

Terraform cloud requires a cloud block with the following format:

terraform {
  cloud {
    organization = "example_corp"
    ## Required for Terraform Enterprise; Defaults to app.terraform.io for Terraform Cloud
    hostname = "app.terraform.io"

    workspaces {
      tags = ["app"]
    }
  }
}

I am able to append the empty cloud block, and then the organization attribute.

# hcledit -u -f main.tf block append terraform cloud
# hcledit -u -f main.tf attribute append terraform.cloud.organization '"$ORG_NAME"'
# hcledit -f main.tf block get terraform
terraform {
  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = ">=3.41.0"
    }
  }
  cloud {
    organization = "$ORG_NAME"
  }
}

Next, I try to append the nested workspaces block:

# hcledit -u -f main.tf block append terraform.cloud workspaces
# hcledit -f main.tf block get terraform
terraform {
  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = ">=3.41.0"
    }
  }
  cloud {
    organization = "$ORG_NAME"
  }
}

I expect to see it appended, but it is not. I also get no output that there was a problem.