Given that you have set up Google Analytics or Facebook Pixel on your WordPress website, then you can enable WhatsApp event tracking.
From your admin dashboard, go to WhatsApp > Settings > open Analytics tab. Here you can enable one or both of the options:
From your Analytics dashboard, go to Realtime > Events to see the recent interactions via WhatsApp click to chat at the moment.
In order to see the full report in a time range, go to Behavior > Events, set the date range, and then you can get insightful events and event value reports.
From your Facebook Business dashboard, go to Events Manager > Data Sources to access the WhatsApp events recorded in your Facebook Pixel.