By default the WooCommerce connector will download data as far back as 450 days. If your shop was created before then and you would like to extend download of historical data further back, you can contact support@funnel.io and request a specific date.

As a first step, please make sure you have added the following dimension filters in your Funnel Data Explorer:

This should filter out all orders that do not show in the regular WooCommerce interface.