Vivoactive 3 doesn't support BLE, but manifest file allows the combination to be selected

I had a user with a 645 (not music) asking if he could test the data field - unfortunately it really doesn't work on the real device either. So it matches the simulator.

with the 645, it could be memory, or maybe different BT HW that's on the 645m for the headphones or something.

Yep the 645 music works in the simulator, so does the 245 & 245m. Seems weird that the 645 doesn't ...

Things like the 245/245m, 645/645m,f6/f6 pro may look to be the same with watch faces,but when it comes to other app types there are differences.  One thing you'll see is different available memory for different app types between the music/non-music devices for example.

Actually be careful as the 645 and 645 music could be different.  I know it works on the actual 645 music, but not the 645.

Until you see it work in the sim, I wouldn't add it back in.