Instagram Cross-App Messenger Update: What's New?
Instagram recently rolled out a new Cross-App Messenger update, which allows user to text their Facebook friends directly from the Instagram App.

Here are the new features you get to see in the new Instagram Cross-App Messenger update, you can-
Change your chat theme
React with any emoji
Swipe to reply to messages
Create Selfie Stickers
Chat with friends who use Facebook
No Facebook messenger app download needed.

However, you can control/choose who can message you by going to Message Controls in your Instagram App settings. Cross-app messaging doesn't change who can see your Instagram posts & stories, to reply to cross-platform messages, you'll need to update messaging, which also gives you access to new chat features.
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