In-App Notification When an Item is Removed/Reduced from an Invoice

In-App Notification When an Item is Removed/Reduced from an Invoice

Hi!

I want to create an in-app notification for when any item is removed from an invoice after it has been created. However, when I try to do this through Custom Workflow, I do not see an option for "Item" under the Workflow Trigger Options. Is there a way this can be done?