When a manager assigns training to an employee, or an employee requests training via their self service, the training outcome section will only appear if the training date is in the past. If you add training for a future date, the training outcome section will not be available until the date of the training has passed.
Training in the future, training outcome not available:
Training in the past, training outcome available:
The training outcome result can then be updated https://naturalhr.zendesk.com/hc/en-us/articles/360005433778-Training-result-options-