1. Create Shortcut Empty bin with action Run AppleScript:
on run {input, parameters}
	tell application "Finder"
		empty the trash without warns before emptying
	end tell
	return input
end run
  1. Create folder macOS Widget and put Shortcut Empty bin into it.
  2. Add Desktop widget with Shortcuts folder macOS Widget.
Screenshots

empty-bin-shortcut
empty-bin-shortcut
empty-bin-shortcut-folder
empty-bin-shortcut-folder
empty-bin-shortcut-widget
empty-bin-shortcut-widget
empty-bin-shortcut-widget-view
empty-bin-shortcut-widget-view

Example
Based on