You might have the ability to clone apps in Android 14, allowing you to be simultaneously logged in to two accounts in one app.

In Android 14 Developer Preview 1, it looks like Google is going to be giving users the ability to clone apps. It's buried a bit deep in the code for this ...

Google’s Android 14 clone app feature is now under testing. Google is now testing Android 14 potentially new feature, which allows users to clone apps to log in to separate accounts ...

Android app developers promptly started work on clone apps to emulate the feature, and one has already hit 1 million downloads on Google Play.

Most Android smartphones offer a built-in function for cloning apps. You can create a Whatsapp clone app and use two different Whatsapp apps with different accounts on the same phone.