Automatic Google Analytics tracking of the coupon print view is a Coupon Creator Pro feature; in the free plugin you can add tracking yourself with a small snippet.
In Coupon Creator Pro, go to Coupons > Options > Link Attributes / Permalinks and enable the option to track print views with Google Analytics. Pro then injects your tracking code into the print-view template for you.
With the free plugin, you can add the same tracking by hand. The print view fires action hooks in its <head>, so you can hook in your Google Analytics tag. Add a snippet like this through a small functionality plugin:
add_action( 'coupon_print_meta', function () {
// Paste your GA4 gtag.js snippet here.
// Use your Measurement ID in the form G-XXXXXXXXXX.
} );
Use a current GA4 Measurement ID (the G-XXXXXXXXXX format). The older Universal Analytics UA- IDs no longer collect data.
For a safe place to keep code like this, see Running Custom Snippets with a Small Plugin. For how the print view works, see Printing Coupons.