Workouts not showing on whatch
Did you select Cardio or Running to check for the workouts in the watch?
ROXFIT data field: https://apps.garmin.com/apps/310b30d8-9a9f-4778-993b-4c55cc4fa4fe
You add that data field to a data screen with just 1 data field for either Cardio or Running. The workouts will be found under Cardio or Running workouts.