By default, the extension does not add customer's personal data to the 'purchase' event. But it is possible to obtain the needed information by creating the conversion for the 'purchase' event and turning on the Enable Enhanced Conversion with User-Provided Data setting in Amasty Extensions > Google Analytics 4 with GTM > Google AdWords Conversion tab.
In order to locate Conversion ID and Conversion Label, follow these steps:
Step 1. Sign in to your Google Ads account.
Step 2. In your Google Ads account, click the Goals menu.
Step 3. Select Summary, which opens to the Conversion Actions table.
Step 4. Select the name of the conversion that you want to use from the Conversion action column (in our case it is 'purchase' event).
Step 5. Expand the tab for Tag setup to view the tag details.
Step 6. Select Use Google Tag Manager.
Step 7. Copy the Conversion ID and Conversion Label.
Step 8. Please, make sure to enable Enhanced Conversions for the conversion as well.
After filling in the settings, and turning on the Enable Enhanced Conversion with User-Provided Data setting, please, export the Json file with the variables, tags and events anew.
Import the file to the GTM container by navigating to Admin > Container > Import Container in the GTM account.
As a result, customer's email address, first and last name, phone number, email will be added to the Data Layer of the 'purchase' event.