GNU/Linux Ubuntu 20.04 Enabling Quick Preview Guide
Hello Linux user! The Tutorial shows you Step-by-Step How to Add QuickLook macOS Style to the GNOME Nautilus File Manager in Ubuntu 20.04 Focal LTS GNU/Linux Desktop.
And Gnome Sushi for Ubuntu Focal is a quick previewer for Nautilus, the GNOME Desktop File Manager.
Finally, this guide includes detailed instructions on Getting Started with GNOME Sushi File QuickLook on Ubuntu.

Quick Preview Ubuntu 20.04 Setup Guide