Entity Print PDF Layout for Views page
The solution came down to replacing &quot;views&quot; with &quot;view&quot; - without the s and &quot;views_page_machine_name&quot; with &quot;all&quot;, such that this:
entity_print:
 views:
   views_page_machine_name : 'theme_name/result-pdf'

became:
entity_print:
 view:
   all: 'theme_name/result-pdf'