Meta-owned messaging platform WhatsApp now has a Picture-in-Picture mode for video calls. WhatsApp announced the feature in Dec. last year, and since then, it has been available for beta testers. While attending video calls on WhatsApp, users might need to minimize the app to check something on their phone, such as an image, email, or text message. Until now, users had to pause their video call to do that, but the arrival of Picture-in-Picture for video calls changes that.
https://screenrant.com/whatsapp-picture-in-picture-video-calls-android-iphone/