Change Siri Icon On macOS Catalina

Does Anybody know how to change the Siri Icon on macOS? I am using MacOS Catalina. I have changed the default Icon in the launchpad, but the main icon, Siri.icns found in ~/Appications/Siri.app/Contents/Resources has not been changed. Help would be much appreciated. If feeling confused as to the question, look at the attached images.

PS: I AM using Catalina, just changed the icons to make it look like Big Sur.

Launchpad:

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MenuBar:

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