Hello Rachel,
Thank you for dropping by here in the Community. I can clarify things with the bundle items in QuickBooks Online.
We recommend making the changes to the products directly in the bundle. It will not affect your historical transactions in the system.
You can also adjust an item's quantity manually without recording a purchase or sale if you have QuickBooks Online Plus and Advanced. Here's the link: Adjust inventory quantity on hand in QuickBooks Online.
Let us know if you still have more questions about managing inventory in QuickBooks. We're always available in this space. Take care, and have a great rest of the day.
