You can use Preferences / Display / Options / Enable background images in virtual folders to change the background color and/or image in folders which are delegated to the Windows shell.
But there isn't a way to change the text color, so dark backgrounds won't work well there.
Microsoft have not documented any way to switch dark mode on for the shell in 3rd party software. Dark mode in Windows is very half-baked at the moment, and looks set to stay that way (typical Microsoft, these days), although we are investigating workarounds.