Troubleshoot different data WooCommerce Report and Matomo eCommerce report

Hi there,

I maintain a small WooCommerce shop where I use Matomo Analytics (via WordPress plugin).

It’s a small shop, so hardly anyone is actually looking at any analytics, however, it’s a good opportunity to learn.

I see that the WooCommerce reports differ from the eCommerce report.
e.g. WooCommerce shows 18 sold items, while Matomo shows only 14 sold items.

What could be the reason for that? How could I troubleshoot that to figure out what’s wrong here?