Getting error "Unknown command: config"

[tech-meppem]

Environment information

System:
  OS: Windows 10 10.0.19045
  CPU: (12) x64 AMD Ryzen 5 5500
  Memory: 11.39 GB / 31.80 GB
Binaries:
  Node: 18.20.4 - ~\AppData\Local\nvs\default\node.EXE
  Yarn: 1.22.17 - ~\AppData\Roaming\npm\yarn.CMD
  npm: 8.19.2 - ~\Documents\path\to\repo\node_modules\.bin\npm.CMD     
  pnpm: undefined - undefined
NPM Packages:
  @aws-amplify/auth-construct: 1.3.1
  @aws-amplify/backend: 1.3.0
  @aws-amplify/backend-auth: 1.2.0
  @aws-amplify/backend-cli: 1.2.8
  @aws-amplify/backend-data: 1.1.4
  @aws-amplify/backend-deployer: 1.1.4
  @aws-amplify/backend-function: 1.5.0
  @aws-amplify/backend-output-schemas: 1.2.0
  @aws-amplify/backend-output-storage: 1.1.2
  @aws-amplify/backend-secret: 1.1.3
  @aws-amplify/backend-storage: 1.2.0
  @aws-amplify/cli-core: 1.1.3
  @aws-amplify/client-config: 1.3.2
  @aws-amplify/deployed-backend-client: 1.4.1
  @aws-amplify/form-generator: 1.0.3
  @aws-amplify/model-generator: 1.0.8
  @aws-amplify/platform-core: 1.1.0
  @aws-amplify/plugin-types: 1.3.0
  @aws-amplify/sandbox: 1.2.2
  @aws-amplify/schema-generator: 1.2.4
  aws-amplify: 6.6.2
  aws-cdk: 2.159.1
  aws-cdk-lib: 2.159.1
  typescript: 5.5.2
AWS environment variables:
  AWS_NODEJS_CONNECTION_REUSE_ENABLED = 1
  AWS_SDK_LOAD_CONFIG = 1
  AWS_STS_REGIONAL_ENDPOINTS = regional
No CDK environment variables

Describe the bug

I'm trying to deploy to an amplify app using S3 buckets, not a repo (we're just doing feasibility / investigation POC). So everything has been zipped, and uploaded to S3, then selecting S3 bucket, then that zip when deploying updates.

We are zipping up the build outputs only, not the full repo. The site loads fine, but now it comes to implementing backend. But I cannot find much documentation or help for setting up the "backend" with manual deployment, as all examples use git repos with the "app settings" page.

The only thing I can find is this page: https://eu-north-1.console.aws.amazon.com/amplify/apps/<appid>/branches/staging/backend-help Which tells me to run a npx ampx generate config command.

However, when running that command, the help text of the command is printed, followed by "Error: Unknown command: config". config is not listed as an available command for ampx generate, so I am wondering if there is a recent update has changed things. It's not listed here either: https://docs.amplify.aws/react/reference/cli-commands/#npx-ampx-generate I cannot find anyone else facing this problem elsewhere. I have been searching extensively.

Reproduction steps

This is the command I'm running (with <appid> replaced), with the output:

npx amplify generate config --app-id <appid> --branch staging

ampx generate

Generates post deployment artifacts

Commands:
  ampx generate outputs               Generates Amplify backend outputs
  ampx generate forms                 Generates UI forms
  ampx generate graphql-client-code   Generates graphql API code
  ampx generate schema-from-database  Generates typescript data schema from a SQ
                                      L database

Options:
  --debug    Print debug logs to the console          [boolean] [default: false]
  --help     Show help                                                 [boolean]
  --profile  An AWS profile name.                                       [string]

Error: Unknown command: config