https://thenextweb.com/apps/2020/04/24/whatsapp-increases-group-call-limit-from-4-to-8-people/

WhatsApp announced today that it’s expanding its group calling limit from four people to eight people. This makes it easier for you to stay in touch with your friends and family during the lockdown caused by the coronavirus pandemic.

The announcement was part of a bunch of new product updates announced by Facebook CEO Mark Zuckerberg.