Not scaffolding files for drupal/auditfiles

Problem/Motivation

composer require 'drupal/auditfiles:^4.2'

./composer.json has been updated
Running composer update drupal/auditfiles
Gathering patches for root package.
Loading composer repositories with package information
Updating dependencies
Lock file operations: 1 install, 0 updates, 0 removals
- Locking drupal/auditfiles (4.2.1)
Writing lock file
Installing dependencies from lock file (including require-dev)
Package operations: 1 install, 0 updates, 0 removals
- Downloading drupal/auditfiles (4.2.1)
Gathering patches for root package.
Gathering patches for dependencies. This might take a minute.
- Installing drupal/auditfiles (4.2.1): Extracting archive
Generating autoload files
Hardening vendor directory with .htaccess and web.config files.
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Not scaffolding files for drupal/auditfiles, because it is not listed in the element 'extra.drupal-scaffold.allowed-packages' in the root-level composer.json file.
Cleaning installed packages.
No security vulnerability advisories found.

it is not a warning, but the only module giving this message. So I suppose there is something missing in the configuration.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes