Curious if it’s normal

When i get scanned for ultrasounds it’s at a imaging center. They NEVER let you see the screen when they are measuring baby ex: 20 week anatomy scan.

You just lay there so awkward as the tech is taking pictures and you aren’t able to look at screen. Is this normal for everyone ?

Anytime they let you see baby is after and longest maybe 5 minutes.

( I’m just curious if this is normal? )