Thank you for posting here on the Community page, JULIE LO.
Allow me to help provide some insights about tracking inventory in QuickBooks.
You'll be glad to know that it's possible to stop tracking inventory. However, there will be reports that are affected by this because these reports include the quantity on hand of the item, cost of goods sold of the item, and the inventory asset account values.
Here's an article you can check to learn more about this: Impacts of Inventory Tracking on Balance Sheet and Profit & Loss Reports.
Please keep me posted on how it goes. Let me know in the comments if you have other concerns about managing inventories in QuickBooks Online. I'm always around to help. Take care,