WhatsApp update: It is being said that this is an extension of the multi-device feature that was added to the platform a few months back, but that doesn’t seem to be the case. Here's everything we know about the Companion mode.
The beta mode of multi-device feature was for people to test the multi-device feature. It was an opt-in feature designed exclusively for users who wanted to experience the multi-device feature.
According to the company, after the test deployment, there has been an increase in the number of users using the feature directly through the web browser.