You can modify your theme to include the product inventory widget on the product pages. This may be necessary if you are using a particularly outdated theme or need to position the widget in a unique way to accommodate advanced scenarios.
Step 1: Navigate to Sales channels > Online Store > Themes. Click the three-dot menu button (…) to the left of “Customize” and choose Edit code.

Step 2: In the theme editor search for “product” or “product-template” depending on your theme. Below is an example of Shopify’s Simple theme “product-template.liquid” file:

Step 3: Insert the following code at an appropriate location in the product liquid file and save your changes.
<div id="inventory-info-app" class="iia-container"></div>The screenshot below shows the app widget just above the quantity selector in the Simple theme:

If you need help, reach out to our support team.