Yes this is fiixed now. Thanks @apaderno.
you can use some of reference Learning Drupal 9:
Drupal.org Community: Drupal.org's forums, community-contributed documentation, and issue queues can be a valuable resource. Users often share their own experiences and solutions. Explore the Drupal community at Drupal.org Community.
Drupalize.Me: Drupalize.Me is a subscription-based resource with high-quality Drupal tutorials. They often provide in-depth tutorials for various Drupal topics, including theming. While it's not free, it might be worth considering if you're looking for comprehensive, up-to-date content.
YouTube: There are many Drupal tutorial channels on YouTube. like
1. LevelUpTuts
2. OSTraining
3.Code Karate
4. WebWash
muskan-gwala → created an issue.