Yeah! You can always ask :) my first pregnancy my dr had an ancient portable machine that didnt have that function. Now they have a new machine that will let you hear it. It all just depends!
I was 12 weeks with a home Doppler. It took me a few weeks to find the baby just cuz its my first and I had no clue what I was looking for. And keep mixing it with mine when I found the heart beat I cried. But for some reason my doctor can never find the heart beat. She always gose and dose the ultrasound and finds it that way