Is this okay ?

My ultrasounds are always very short the doctor doesn’t really say anything but “ okay that’s the the baby “ “ good fluid in there “ today’s ultrasound lasted like 6 seconds and honestly I’ve been having a little bit of anxiety about my babies health and I wish the ultrasound can go a little longer so I can see if the baby moves or something ...

Can a doctor have an ultrasound lasts so little ?

What are some questions I should ask during my ultrasound?