Not really.

Its windows itself, switching default cards can be done but its a pain in the rear so I hardly do it actively.

Worse still if you switch away with nvda it may just screw up till you restart it and I have always switched back.

What I would tend to do if at all possible is make the internal card the default and switch applications as needed.

Its a pain but it probably works better.

The other way is to switch everything to the card in general bar nvda, and then switch nvda back to the card before you unplug it and it should in theory work.

Or set the external to the default card, and in theory it should switch back through.