App Clonning in the new iPhone XS Max

I have two separate phone for Work and personal, I bought iPhone XS Max to get both in one phone, however:

App twinning or App cloning which basically allows you to have two instances of an app working independently of each other. 

To give you an example, with two numbers on your phone, you might also want two different WhatsApp accounts. Most Android phones with dual SIM cards will allow you to create a clone of WhatsApp and use it with your secondary number. 

What should I do now?

I really need to use one phone to make my life easy.