Google Ads attributes the conversion data to the click data and thus to click dates. Because of that, their standard ‘Conversion’ and ‘Conv. Value’ columns report the conversions on the dates when the clicks occurred that led to these. Google Ads also has fields that report conversion data based on order dates, these are called Conversion (by conv. time) and Conv. Value (by conv. time). These column values will be more in line with the numbers in Google Analytics and the wecantrack dashboard.

In the following article from Google you can read more regarding Google Ads conversion attribution: