Watch face exposure

Toggle wake on wrist raise

iPhone>Watch>General>Wake Screen>Wake on Wrist Raise>Toggle on

If that is already on it probably means that you are in Theater mode

if so then

Swipe up on the watch face to open the control panel

Tap off the 2 faced icon

Do you have theatre mode enabled?

Open the Control Center by swiping up from the bottom of the screen. Look for the button with two masks. If it's active, tap it to deactivate it.

I'm glad it helped.