Hi, @ins. I'm here to help.
QuickBooks Online (QBO) currently doesn't have a direct option for adding and tracking sub-products, which means that sub-products created in Sandbox will not be synchronized with QBO. In the meantime, I recommend finding a third-party inventory management app that has this function. Let me show you how.
- In your QBO account, go to Apps.
- Select Find Apps.
- Type in "inventory management" to search for related apps, or choose Browse categories.
Additionally, I encourage submitting a feature request to our product engineers within your QBO account about adding a sub-item option. This will afford customers a better experience in managing inventory using the software in future updates.
- Go to the Gear icon.
- Select Feedback.
- Enter your comments or product suggestions.
I'm also adding this guide about categorizing products and services to gain insights into running sales and inventory reports in the future: Group products and services into different categories in QuickBooks Online.
You're always welcome in the QuickBooks Community if you have further updates about syncing your products in QBO. Take care.