Indeed we are missing most of the desktop icons settings in the Settings app.
To see all the settings you will need to:
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sudo apt install gnome-shell-extension-prefs
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Open the Extensions app.
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Click on Desktop Icons NG (DING) > Settings
Alternatively just run:
gsettings set org.gnome.shell.extensions.ding show-trash false
gsettings set org.gnome.shell.extensions.ding show-trash true