Why isn't my sale showing up in Google Analytics?

[Danielexx85]

Hi,

on 23/09 I had 2 visits on my website with 1 sale. However that sale is not counted in Google Analytics and on that day my revenue is 0. From Shopify Analytics I see that one of two sessions were coming from Duck&Go. 

I am wondering if Maybe the session that caused the sale was on Duck&Go so that's why it is not in the analytics?

thanks