WhatsApp Developing Message Threads to Simplify Group Chats

The feature, spotted in a beta update, aims to organize replies into threaded conversations for easier navigation.

WhatsApp is testing a message threads feature that organizes replies into dedicated threads, making group chats easier to follow.
The feature was discovered in the Android 2.25.7.7 beta update and is still under development, with no confirmed release date.
Message threads will allow users to view all responses to a quoted message in one place, reducing the need to scroll through long chat histories.
The feature is expected to improve navigation in busy group chats, individual conversations, communities, and channels.
Currently available for beta testing on Android, the feature is likely to roll out to iOS after further testing phases.