You can choose up to four nutrients to display on your daily log in addition to macros and calories. The nutrients available to display are:
Water
Sodium
Sugar
Fiber
Saturated Fat
Iron
Potassium
Calcium
To change which nutrients are displayed:
Go to More (⚙️ icon)
Tap "Display"
Enable the nutrients that you wish to see on your daily log.
You can also view daily reporting of all nutrients using the Nutrition Report:
Nutrition Report
View daily totals and averages over time for all nutrients