Old version of plug in 1.5.1

Hi All,

I have an old site running version 1.5.1 of the plugin. The site is WordPress 4.7.4 and WooCommerce 2.6.4. There is so much custom code made through the years to keep the site alive that there is no way it can be upgraded without a huge undertaking. I need to install GA4 now. Would this be possible with the version I have? It currently passes some data back to Google Analytics but definitely not conversion or e-commerce data.