WhatsApp Phone Capture allows you to receive and initiate voice and video calls with multiple participants in one of the following ways:
Group Call
To initiate a group call:
Open a group chat in the app.
Tap the video or voice call icon within the group.

Tap
to confirm the call.
Conference Call
To initiate a conference call:
When engaged in a 1:1 call, tap the add participant icon.

Select the participant(s) and tap Add to Call.

This results in a conference call.
When the group or conference voice or video calls are archived, the TO header displays all the participants in the call.
Figure 1: WhatsApp Voice Calls

Figure 2: WhatsApp Video Calls

Limitations
If a user leaves a group or conference call and re-joins the same call, the call and call logs are not captured for the user after re-joining the call.
If one of the non-archiving participants leaves and re-joins the call, the activity is not displayed in the archive.
If some group/conference participants ignore a group/conference call, the participants are still displayed in the recipients list.