I don’t think you can connect to your watch directly using the libre app. You need to connect the libre to a third party app (I use Shuggah on iPhone, but there are others), disable Bluetooth access for the libre app (v important step), and then in the third party app enable calendar complications (so the app writes your BS to your calendar). This is how your watch picks it up (through the calendar). At least that’s how it works on iPhone/ Apple Watch.
Remember to still manually scan your libre, otherwise your consultant might be a little annoyed