Accessories or USB port set to work without key
 

Folks
Anyone know if it is possible to set the Accessories and/or USB ports on my 2018 Pilot Touring to work without keys set to accessories position for cell phone charging while engine is off? If so how do I DIY?
FYI my antique 2001 Chrysler T&C had an unswitched accessories port on the dash and my soon to be antique 2008 Mercedes E350 allows the primary accessories port to be set both ways through the fuse holder....great option!!!
Thanks for your help