Start with a face that includes the field
Sunrise and sunset are not available on every design or edition. Check the feature list of the edition you have installed; Luna and Beacon are examples with solar information in their designs.
Check the location on your watch
Solar times depend on location. If the displayed time looks wrong, consult your watch manual to refresh location and check that the watch is synced.
Tell us what you see
If the field remains incorrect, contact the studio with your watch model, face, edition and the solar times shown. Do not send account credentials.