Linux Shout published a tutorial about customizing the look of your Ubuntu Linux 20.04 LTS installation.

How to give macOS like look to Ubuntu 20.04 LTS

Turn your Ubuntu 20.04 Linux Interface to macOS like by installing themes, icons and Dash to Dock using Gnome Tweaks customization tool.

How to give macOS like look to Ubuntu 20.04 LTS - Linux Shout