View-like types are loosely defined as the set of class templates that behave like Kokkos::View from an interface perspective. There is not a full formal definition of what this means yet, which means there is no way for users to add to this list in a way that the new class is recognized by Kokkos facilities operating on View-like things. In Kokkos these class templates are considered View-like:
Notably, Kokkos::DualView and Kokkos::ScatterView are not included in this category.