How do I test multiple Watches in the SDK Emulator?

You select different target devices in VS Code When you do a run.

Thank you! Not sure why this didn't show up the first time I tried. Thanks again so much!

Sorry. It comes up when I do my first run, but how do I then re-select a new product my next run?

If I re-launch VSCode it prompts me again to select a new device. Is there a better way?

It asks me every time I do a run.  In the screen shot I posted you'll see the 255 at the top, as that's the last target I had used. To select the app to run, I use this: 

hi, see here https://forums.garmin.com/developer/connect-iq/f/discussion/281399/vs-code---start-debugging---device-selection

you will see a "solution" to have devices selection after evert F5 running,

it is what I've been using and it perfectly works.

Yes, this is an annoying thing in VSC. It only asks once. But if you add a launch.json file it'll ask every time you run. Search the web for launch.json 

In the screen shot I posted, if you scroll down, there is the option to add one.  Just a simple click