Composer cannot find tara 10.1

Problem/Motivation

$ composer require 'drupal/tara:^10.1'
./composer.json has been created
Running composer update drupal/tara
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires drupal/tara, it could not be found in any version, there may be a typo in the package name.

Steps to reproduce

composer require 'drupal/tara:^10.1'

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes