If they did, it’s still entirely possible to use your own e2ee for messages between friends on any app just by using an encrypted keyboard app on your phone (like KryptEY).
Nobody using Instagram DM’s is actually going to go out of their way to encrypt messages like that, people who care about privacy are going to move their conversations to Signal or another secure app with E2EE built in
If they did, it’s still entirely possible to use your own e2ee for messages between friends on any app just by using an encrypted keyboard app on your phone (like KryptEY).
Nobody using Instagram DM’s is actually going to go out of their way to encrypt messages like that, people who care about privacy are going to move their conversations to Signal or another secure app with E2EE built in