looping inside cloud build for multiple deployments

I'm trying to create multiple deployments using Cloud Build and Cloud Deploy in GKE cluster. Below is my cloudbuild.yaml

steps:
- name: "gcr.io/cloud-builders/gcloud"
  entrypoint: 'bash'
  args: 
  - '-c'
  - |
    while IFS= read -r deplname; do
      sed -i "s/service/$$deplname/g" ./test/deployment.yaml
      release_name=$$(echo "build-$$RANDOM")
      gcloud deploy releases create $$release_name --project=PROJECT_ID --region=us-central1 --delivery-pipeline=test-cloud-deploy --source=. --images=test-cloud-deploy=us-central1-docker.pkg.dev/PROJECT_ID/cicd-test/test-image:v1
    done < ./consumer_names.txt
options:
 logging: CLOUD_LOGGING_ONLY

my consumer_names.txt looks like,

deployment-name1
deployment-name2

deployment.yaml looks like,

apiVersion: apps/v1
kind: Deployment
metadata:
  name: service
spec:
  selector:
    matchLabels:
      app: service
  template:
    metadata:
      labels:
        app: service
    spec:
      containers:
      - name: service
        image: nginx
        ports:
        - containerPort: 80

But it's creating only one deployment that is deployment-name1 not second. Is there any way to create multiple deployments using cloud build and cloud deploy ?