This article explains how to change the watch face on a Fitbit Versa or Versa 2 using the Fitbit app on your smartphone.
How to Change Watch Faces on Fitbit Versa & Versa 2
You can change the watch face through the Fitbit app on your smartphone.
Open the Fitbit app on your smartphone and tap the account icon in the upper left corner, then choose your Versa from the list of devices.
Tap Watch Faces > All Clocks.