I'm not certain that will work because AFAIK, Hubitat switches, virtual or otherwise, cannot be used as triggers for Alexa routines.
However, Hubitat contact and motion sensors would definitely work for this purpose, and here's where Chris Wilson's (@cwwilson08) Virtual motion with switch driver comes in handy. Posted by @SmartHomePrimer here:
At the Hubitat end, it can be used as a switch, but is exposed as a motion sensor at the Alexa end that can be used to trigger a routine.
I used @cwwilson08's driver to make a Virtual Contact with Switch driver that works the same way. Posted here: