Hello!
While I haven’t built one specifically for Shopify, I have built a couple Pixlets for displaying sales data for other ecommerce platforms like Salesforce B2C Commerce (Demandware) and WooCommerce.
Here is an example of one I built that updates every 5 minutes using my Homebridge plugin:
The star file for this is purely for rendering as I pull all of the metrics using a Node.js module in the Homebridge plugin.