Hello, love DisplayFusion, I've been using it for like 10 years. Seeing as Microsoft are lazy and haven't done this or responded to requests to implement, it would be awesome if you could add a "Function" for toggling "Night Light" on or off. Would be VERY appreciated. Many thanks! Keep up the great work!

A quick way to toggle the nightlight setting on and off is just two clicks.
One - click on the Action Center icon.
Two - click on the nightlight to toggle it.

Yes. I am aware. But I would prefer a keyboard shortcut if possible.

Another work around you could try is to download this little app
https://www.softpedia.com/get/Multimedia/Video/Video-Recording/TinyTask.shtml called TinyTask.
Record a macro of opening the action center, clicking on the nightlight button then on the desktop to close the Action center. and compiling the macro.
Set the playback speed high and associate a shortcut key to the macro (exe).
It worked quite well when I tried it.