Similar issue here, I am using the following tf module: https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/artifact_registry_repository_iam#google_artifact_registry_repository_iam_member

resource "google_artifact_registry_repository_iam_member" "member_runner" {
  project       = google_artifact_registry_repository.my-repo.project
  location      = google_artifact_registry_repository.my-repo.location
  repository    = google_artifact_registry_repository.my-repo.project
  role          = "roles/artifactregistry.reader"
  member        = google_service_account.deploy_service_account.member
}

Still investigating the reason why I am seeing, this error, note that I have created the "hosting" project using this google tf module: https://github.com/terraform-google-modules/terraform-google-project-factory