Yes, You can use GA4 and UA both on your Magento store. However starting on July 1, 2023, standard Universal Analytics properties have stopped processing new data, and you will lose access to the Universal Analytics interface starting on July 1, 2024. So it is advisable to start focus on GA4.

You can install our GA4 with GTM Support Extension for Magento 2 to install GA4 on your Magento store.

Read this How to Setup Magento 2 GA4 (Google Analytics 4) with GTM guide to setup this extension.

Here are the few more resource to help you get most out of this Magento 2 GA4 with GTM Support Extension.

• How to Add Google Analytics 4 (GA4) with GTM in Magento 2
• How to Use GA4 with GTM Extension for eCommerce store
• How to Add Google Analytics in Magento 2
• How to Add Google Tag Manager (GTM) to Magento 2