Whatsapp is testing inline images style for notifications. After its announcement that it is soon to end support for Older Apple devices, it is now seen to be testing new inline images. Although the inline images were already a part of the app but now it will support a new format wherein it can expand and collapse inline images.
The feature is yet being tested so that it can better align with Android 9 (pie) for Google's Pixel lineup. With this feature,users who are part of the Whatsapp groups will be able to preview the images upon expansion if they are running on Android Pie.