Create face watch by memoji
I did not see the option to create a watch face when scrolling down
Apple Watch Series 4, watchOS 7
Question marked as
The Memoji face should be available on S4 and later, in the watch Face gallery. Check the prerequisites and guidance in here:
Apple Watch faces and their features - Apple Support
More help is available here too:
How to Set a Memoji or Animoji as Your Watch Face on Apple Watch - MacRumors