Preprocess execution is not where my view is
In Drupal 8 it is possible to have preprocess functions for the theme suggestions.

So let's say if your template for the View is views-view--test-view--block-1.html.twig, you would have following preprocess functions:


THEMENAME_preprocess_views_view__test_view__block_1
THEMENAME_preprocess_views_view__test_view
THEMENAME_preprocess_views_view