Added custom fields to the Service Eng App in time clocking screen. However, the same is not visible in the mobile app.

apps page designer has Service engineer and Maint Eng Screens only.

The fields are visible in the time clocking screen in Service engineer Screens. However, cannot see it in the mobile.
Same was done for MWO screen (MaintEngApp) and it works.
In the page Configuration screen we cannot see ServiceEngApp

What are we missing?