Currently "Buy X and Get Y" discount is only related to the whole order and not at the order item level.
I needed order item level discounts. e.g. buy 10 or more of the same product and get 10% off that order item.
The new promotion will only discount at the order item level for order items with a quantity of 10 or more.
By default Drupal 8 commerce 2.x product variations do not have a default currency setting for multi-currency projects.
Currently, there is a patch in the works to solve this issue. The patch can be found in the commerce issue queue: https://www.drupal.org/project/commerce/issues/3016777
Thank you a.dmitriiev for creating a patch to solve this issue!
Drupal 8 has a really great configuration synchronization system, and is great for syncing up different environments. When creating new modules and adding new fuctionality I really enjoy working with Drupal 8's configuration synchronization tool. Not only does this tool take the guesswork out of updates that need to be made on other environments. The configuration synchronization also allows for all changes to be documented.