You can simply export your sent notifications in a CSV file to have more insight into them. You can export them by going to your Shopify admin> Apps > Restockify > Reports> Sent notifications then click on Export.
The CSV file has 6 columns which are as follows:
The address of the product that the subscriber has requested from your website.(not the Shopify admin)
The email address of the subscriber (e.g. email@example.com)
The status of the sent email out of Sent, Failed, Delivered, Opened, Clicked, Ordered.
Name of the product that the subscriber has requested. (e.g. Tennis is my love - Vinyl Sticker)
Name of the variant of the product that the subscriber has requested. (e.g. size variants: xs, xl, etc.)
Status of the product in your Shopify admin panel like Active, Draft.
Type of the product in your Shopify like Suits, Dresses, etc.
SKU of the variant if it has one.
Vendor of the subscribed product.