I see now, thanks. When I looked before it was just an Event Trigger and an Email Node.
In your Device: Verify Node, you are choosing an explicit device from your application. Instead, you want that to be a variable from your payload - specifically, in the “Device ID Template” field, enter a value of “{{data.deviceId}}”, which will pull the device ID from the event that fired the workflow. Now you are dynamically comparing the event’s associated device to your Experience Group.
If you’re not comfortable working with templates (variables) in workflows, we have a number of resources in our documentation; in Losant University; and a Deeper Dive on Advanced Templating. I recommend checking those out.