Welcome to this forum, @contact-gourmetf.
I'm joining the thread to share additional insights about handling and managing inventory in QuickBooks Online.
Fiat Lux - ASIA is correct. You'll need QuickBooks Online Plus and QBO Advanced to use our inventory features. Once you have those services, you can already turn on the settings, using these steps:
- Click Settings ⚙, and then Account and settings.
- Go to Sales.
- Click the Edit ✎ option in the Products and services section.
- Turn on Show Product/Service column on sales forms.
- Enable both Track quantity and price/rate and Track inventory quantity on hand.

- Select Save, then Done.
Also, here are some guide links for you to get started with inventory management in QuickBooks Online:
For further questions with how QuickBooks handles inventory and other program concerns, mention me anytime. I'll make sure to guide you anytime. All the best.