A recipe that installs Emulsify dependencies and sets Emulsify as the default theme.
See https://www.drupal.org/files/issues/2023-10-01/Configuring%20Drupal%20to%20Apply%20Recipes.md
composer require fourkitchens/sous-emulsify
If you used the Sous Project as your starterkit:
lando install-recipe fourkitchens/sous-emulsify
Manually applying the recipe to your own project: From your webroot run:
php core/scripts/drupal recipe recipes/sous-emulsify
drush cr
composer unpack fourkitchens/sous-emulsify