What is the best way to share model (e.g. list of objects) between different ViewModels?

I'm trying to undestand how to share data between two or more ViewModel, because i want to change property of object or several objects in ine fragment and see the changing data in a the other fragment immediately (e.g. on tablet when i can see two fragments in the same time).

I guess this is a completely architectural solution, but I'm new to this so I ask for advice