Thanks for following up with the Community, LMaynJJM. I appreciate your detailed information and screenshots.

If class tracking is set to One to reach row in transaction, QuickBooks will assign a class called Not Specified for your Discount Given. To assign specific classes to discounts, you'll need to change the settings for class tracking to One to entire transaction. Detailed steps for doing so can be found in RoseJillB's post.

I've also included a detailed resource about working with classes which may come in handy moving forward: Get started with class tracking

Please feel welcome to send a reply if there's any questions. Have a lovely day!