I'd be glad to help you retrieve an item from your product list, @userbabitajpatel.
If you have deleted something from one of the lists, you can use the Product and Services page to restore it.
Here's how:
- Go to the Settings ⚙️.
- Under Lists, select All Lists.
- Open the Products and Services link.
- Click the Filter icon, and in the Status dropdown menu, choose Inactive.
- Click Apply.
- Once the deleted list shows up, under the Action column, select Make Active.
Additionally, I've added this article to guide you to manage lists in QuickBooks Online: How to edit and delete list elements.
Feel free to let me know if you have other questions. I'll get back to you as soon as I can. Have a pleasant day.