GA4 - Insight

Business problem

My e-commerce team wants to see more details from the Trengo widget in GA4 than are currently available.

Desired result

What we want to measure:
To get insights into the use of the Trengo widget in GA4.

Technical details 
Our GA4 setup via GTM + server-side is correct; client-side events are being sent.
The current bottleneck is determining what Trengo can actually send.

One of the following two options would work for us:

1. GA4-native events
   Trengo sends client-side GA4 events via gtag('event', …) with clear, GA4-compatible event names (e.g., trengo_widget_open, trengo_chat_started, trengo_message_sent).

or

2. Exposed JavaScript events
   Trengo exposes its own JavaScript events (e.g., via window or CustomEvent), allowing us to capture them in Google Tag Manager and forward them to GA4.