Composer is now required.

This should be fixed.
Instead of relying on composer to manage 3rd party library beyond our control, added dependency to https://packagist.org/packages/d34dman/vanilla-icon-picker to resolve the issue without much composer hackery. Please test and let me know if this works for you.

Try,
composer require drupal/fontawesome_iconpicker:^3

After a much await, we have a working composer installation.

Marking this as fixed.

Check https://www.drupal.org/project/fontawesome_iconpicker/issues/3359673#com... 🐛 Cannot install on Drupal 10 with composer Fixed for report.

Automatically closed - issue fixed for 2 weeks with no activity.