Nope, the phone is not connected to the bike. I've got a Google Pixel phone on the latest firmware, but I couldn't get the phone to connect to the WiFi AND the cellular, and that's why I didn't even try Garmin Motorize. I was using Calimoto on My old bike and still am happy with it.
Samsung phones are reported to allow for simultaneous connection here in the forum. FWIU they ship a modified Android firmware which allows for that. YMMV.