compose/docs/reference/compose_restart.md

Restarts all stopped and running services.

If you make changes to your compose.yml configuration, these changes are not reflected after running this command. For example, changes to environment variables (which are added after a container is built, but before the container's command is executed) are not updated after restarting.

If you are looking to configure a service's restart policy, please refer to restart or restart_policy.