Step counter to watch face

I've used an app called StepsApp that has complications you can put on the watch face to show steps. There are lots of other similar apps in the App Store.

For more information about complications and how to add them to the watch face, see here:

Customize the watch face - Apple Support

Only with a 3rd party pedometer app.

This is the nearest to what you want on the watch.

Tap on activity app and scroll down;