To simplify migration, a single ecommerce implementation can be used for both Universal Analytics (UA) and Google Analytics 4 (GA4) measurement.

To learn more and get started with your ecommerce migration, select the tagging solution you're using:
Google tag (gtag.js) Tag Manager Help
Ecommerce event translation allows you to use a single ecommerce tag implementation for both UA and GA4. It works well for the following scenarios:
  • Existing UA ecommerce implementation for GA4 measurement:
    Allows you to completely maintain existing UA ecommerce reporting and easily enable GA4 ecommerce measurement.
  • New GA4 ecommerce implementation for UA measurement:
    Allows you to take full advantage of GA4 ecommerce features and maintain UA ecommerce reports.
Not sure which tagging solution you're using? Use the ecommerce migration helper tool to find out.