If you're using custom placement for triggers, you will need to manually install back-in-stock widget. Here's a simple guide to help you install back-in-stock widget on Shopify product page.
From overview page, click Show Code to get widget snippet. Snippet should look something like this:
<div
class="ov-app ov-app-back-in-stock-inline-button"
data-app-id="bis_1gsj5lrwqzv0twc"
data-app="back-in-stock-inline-button">
</div>
Next, locate product template file
sections/product-template.liquidtemplates/product.liquid
Search for an element with this code: {% endform %}
Then paste snippet after that element.
This should place back-in-stock widget just below add cart button.
Shopify Online Store 2.0 (Optional)
If you are using a theme that supports Online Store 2.0, you can use app block to add widget. Simply select Custom Placement when setting up widget and follow installation instructions from Show Code button in overview page.
Need help installing?
If you need additional help to install, you can contact us.