The practice of bundling "singles" or individual documents into a ZIP file is common across various fields:
Platforms like Canvas or Moodle allow instructors to perform a "bulk download," where all student essay submissions are packed into a single ZIP archive for offline grading. Download Singles zip
Large document packages with numerous attachments are often downloaded as a single ZIP to save time. How to Create and Manage a Single ZIP Archive The practice of bundling "singles" or individual documents