services:
  app-x:
    image: busybox
    init: true
    command:
    - "sleep"
    - "1000"
    network_mode: service:app-y
      
  app-y:
    image: busybox
    init: true
    command:
    - "sleep"
    - "1000"

Attaching to scratch-app-x-1
Error response from daemon: network service:app-y not found

docker compose version
Docker Compose version v2.21.0-desktop.1

Client: Docker Engine - Community
 Version:    24.0.5
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.11.0-cloud-driver+002
    Path:     /home/nick/.docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.21.0-desktop.1
    Path:     /usr/lib/docker/cli-plugins/docker-compose
  dev: Docker Dev Environments (Docker Inc.)
    Version:  v0.1.0
    Path:     /usr/lib/docker/cli-plugins/docker-dev
  extension: Manages Docker extensions (Docker Inc.)
    Version:  v0.2.20
    Path:     /usr/lib/docker/cli-plugins/docker-extension
  harmonia: A brief description of Harmonia (Docker Inc.)
    Version:  1014447
    Path:     /home/nick/.docker/cli-plugins/docker-harmonia
  init: Creates Docker-related starter files for your project (Docker Inc.)
    Version:  v0.1.0-beta.7
    Path:     /usr/lib/docker/cli-plugins/docker-init
  sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
    Version:  0.6.0
    Path:     /usr/lib/docker/cli-plugins/docker-sbom
  scan: Docker Scan (Docker Inc.)
    Version:  v0.26.0
    Path:     /usr/lib/docker/cli-plugins/docker-scan
  scout: Command line tool for Docker Scout (Docker Inc.)
    Version:  0.24.1
    Path:     /usr/lib/docker/cli-plugins/docker-scout
  sleep:  (Docker Inc.)
    Version:  0.1.0
    Path:     /home/nick/.docker/cli-plugins/docker-sleep

Server:
 Containers: 7
  Running: 5
  Paused: 0
  Stopped: 2
 Images: 39
 Server Version: 24.0.5
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: systemd
 Cgroup Version: 2
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 8165feabfdfe38c65b599c4993d227328c231fca
 runc version: v1.1.8-0-g82f18fe
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 5.15.0-82-generic
 Operating System: Linux Mint 21.1
 OSType: linux
 Architecture: x86_64
 CPUs: 8
 Total Memory: 15.25GiB
 Name: grumpy
 ID: 9cba2c25-6ba4-4f6c-995c-53aacc5cc77e
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false