How do I find the e-commerce conversion rate in GA4?

Unlike in Universal Analytics, the' e-commerce conversion rate' metric is missing in GA4. However, you can still calculate it.

You can use the 'user key event rate' in GA4 to calculate the ecommerce conversion rate with user scope.

Similarly,

You can use the 'session key event rate' in GA4 to calculate the ecommerce conversion rate with session scope.

So, there are two types of ecommerce conversion rates in GA4:

1) 'user key event rate' where the key event ='purchase'.

2) 'session key event rate' where the key event ='purchase'.