Launch the Terminal app on your Mac
defaults write com.apple.dock persistent-apps -array-add '{tile-data={}; tile-type="spacer-tile";}'
killall Dock
Ref: https://www.idownloadblog.com/2023/06/01/how-to-add-space-to-dock-mac/
How to add transparent space separators to the Dock on your Mac
Add space into your dock!
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