Set up DND on work phone but not personal phone

I want to use focus as an “out of office” notice for texts on my work phone. But I do not want the same focus on my personal phone. I have two iPhones and a tablet under the same Apple ID.

Also is the “if this is urgent, you can break through” ever going to be disabled or set up as an opt in. If I’m off for the weekend or on vacation, I’m not responding to texts no matter how urgent it is.

How can I do this?