Stylized transformation

I am not savy of mixer or stylized rendering but I would like to have an easy way to achieve a stylized enviroment than to build it all from scratch in an external application.
Hopefully in UE5 it is more doable with the full integration of Quixel and now Nanite.

I noticed there are 2 ways in achieving a sylised enviroment:

  1. I saw a short video regarding manipulating megascans in mixer
  2. stylized rendering

Is it possible to:
a. either have some premade stylized materials ? (or have the mixer team develop smart ones inside)
b. either (or extra) to get in depth information about how to use the rendering stylized feature for the free megascans actors, including the procedural trees ?