According to a report by WABetaInfo, Facebook has integrated Messenger Rooms into WhatsApp for Android with the 2.20.163 beta update. The update brings a new “Room” option to the share menu inside the chat, which directs you to Messenger to create a room to have a group video call with up to 50 people.
The shortcut to creating a Messenger Room is also available in other parts of WhatsApp, like the Calls tab.
This feature is currently only available to a limited number of beta users in a few countries, including the US, but it should expand to more countries soon.
If you are interested in giving this feature a try, you can enroll in the beta program by heading this way, or simply download and install an apk of beta version 2.20.163 of WhatsApp for Android from a reliable source.