At the moment you do not have a way to implement the global line height setting to the individual V2 Test Elements, but our development team is working on a templating system for the V2 elements. So you will add a text element and set the options as you like and will create a template from it which then can be used for the other instances of the Text element.
A rough idea of the feature is personated in this article:
I encourage that you also join the discussion and give your ideas there, that will help us create something that will be accepted by the whole community.
As of the moment, there’s already discussion on how to implement the inherit value for line height. A way to inherit line height set on the body like how classic element works. I will add this request there. Thank you.