https://techcrunch.com/2020/10/13/messengers-latest-update-brings-new-features-cross-app-communication-with-instagram/

Facebook Messenger is getting a visual update and a number of new features, including support for chat themes, custom reactions, and soon, selfie stickers and vanish mode. The changes are a part of Facebook’s overhauled messaging platform, announced in late September, which introduced the ability for Instagram users to communicate with people on Facebook for the first time.

While Instagram users had to opt-in to the upgraded new feature set in order to also gain access to the cross-platform communication capabilities, Messenger users don’t have to make a similar choice.