It's an app

It can't encrypt anything so it can't do end to end encryption

If it was an app for a single platform that does end to end encryption, that wouldn't make it an app that does end to end encryption, that would make it an app that does encryption on a platform that does end to end encryption

But it's never even an app for a platform that does end to end encryption

It's always an app for a consumer OS with potential software backdoors running on a wide variety of consumer devices from a wide variety of manufacturers with a wide variety of potential hardware backdoors so there's no assurance of any encryption involved being end to end at all

And none of this is really new information to you

This is just connecting the dots on what some words mean and you already know what those words mean, so you have to think about how it got to this point