(1) Why is it that the Non-Inventory Item is not appearing in Purchase Order and Bills? (2) Why is it that there is no Product Type of Inventory Assembly?

QBO doesn't provide the assembly feature. You need to have an inventory management app with the assembly feature or a manufacturing app to integrate with QBO.

It's great to have you here in the Community space, Justus. Let me guide you on how to make Non-inventory items appear on Purchase Orders and Bills and record inventory assembly using Bundles in QuickBooks Online (QBO).

If you've recorded these Non-inventory items properly, you'll be able to view and add them to your Purchase Orders and Bills. To verify this, let's go to the Products and Services section.

Here's how:

1. Go to the Settings icon at the top right corner of your QBO page.
2. Select Products and Services.
3. Enter the name of the item in the Search box.
4. If you can see the Non-inventory in the Type column. Then, these have been recorded correctly.
5. If not, we can change the item type to Non-inventory.

Additionally, ensure that you've selected the Item Details section so you can add the Non-inventory items to your Purchase Orders and Bills:

On the other hand, let's record your build assembly as a Bundle since the inventory assembly product type is currently unavailable in QBO. Bundles are considered a collection of multiple Products and Services that you can use to track the raw materials:

1. Go to the Settings icon and select Products and Services.
2. Click the New button, then choose Bundle.
3. Enter the required details for this Bundle.
4. Click Save and Close.

Furthermore, let's run reports to get valuable insights into things you buy and sell: Use reports to see your sales and inventory status in QBO.

Please let me know below if you require further assistance with making your Products and Services appear on expense transactions or properly recording inventory assembly. I'm always here to help.