How to install dual WhatsApp on iphone xs max

You can only have one copy of an app on a device.

But I activate the ESim and i want to use whats app on it too any solution for that i need two whats app

You can only have one copy of each app on a device.

I do know that... thats why im asking if we have solution for that as for now im using physical SIM and E SIM. both i need whats app

not unless/before facebook build in the feature of activating to more than 1 number in their whatsapp

You are asking the wrong people, you need to talk to the app's developer.

thank you 🙂