With Silent Mode/ dark mode, do the interior dome lights still turn on when a door is opened if the overhead dome light switch is set to "door"?
Also, I believe you can toggle it on/off directly from the SYNC screen (Vehicle Settings → Silent Mode slider) after first enabling it using FORScan (APIM and BCM changes for Centerstack Settings + Silent Mode Control Function), according to Grok.
I may give this a try. It'll come in handy when camping so my truck doesn't light up the whole campsite like a Christmas tree