WhatsApp has been spotted working on 'edited' labels on version 2.22.22.14 of the app by a feature tracker. The messaging service will reportedly add an ‘Edited’ label under altered messages to ensure transparency in communication. The feature is under development and for now, the release date or timeline for this feature remains unclear.

source https://gadgets360.com/apps/news/whatsapp-edited-label-label-modified-texts-upgrade-beta-testing-3438227#rss-gadgets-all