Cannot get hook for custom twig template to work

I have a custom template with the following twig file:

views-view-unformatted--offices_contact_us_page_.html.twig

The view is added as part of extra fields module inside of a Drupal paragraph. I have tried everything but simply cannot get the hook to work, however, the .theme file is loaded correctly as I can add an exit to the preprocess_page() function and that works.

I have tried:

1. _preprocess_views_view_unformatted()
2. _preprocess_views_view_unformatted__offices_contact_us()
3. _proprocess_node()
4. _preprocess_views()

I am able to inject my variables through the _preprocess_page, but then the variable is not available inside the above view, so need to alter that hook. Any ideas as to what I am doing wrong or alternatively is there a way for me to "print" all hooks that are loaded (like their names) during the request so that I can better determine what I am doing wrong?