Tap Settings.

Tap Screen Time.

Tap Turn On Screen Time.

Tap Continue.

Tap This is My iPhone.

Tap Downtime.

Tap the indicator next to "Downtime" and follow the instructions on the screen to select Downtime period.

Tap arrow left.

Tap App Limits.

Tap Add Limit.

Tap the required categories.

Tap Next.

Set the required time limit for use of the selected category.

Tap Customise Days.

Tap the required days.

Select the required time limit.

Tap arrow left.

Tap Add.

Tap the required category.

Tap Delete Limit.

Tap Delete Limit.

Tap arrow left.

Tap Communication Limits.

Tap During Screen Time.

Tap the required setting.

Tap arrow left.

Tap During Downtime.

Tap the required setting.

If you select Specific Contacts, follow the instructions on the screen to select the required contacts.

Tap arrow left.

Tap arrow left.

Tap Always Allowed.

Tap the add icon next to the required app to add it to the list of allowed apps during Downtime.

Tap the remove icon next to the required app to remove it from the list of allowed apps during Downtime.

Tap Remove.

Tap arrow left.

Tap Content & Privacy Restrictions.

Tap the indicator next to "Content & Privacy Restrictions" and follow the instructions on the screen to select settings for content and privacy restrictions.

Tap arrow left.

Tap Use Screen Time Passcode and follow the instructions on the screen to select a Screen Time password.

Slide your finger upwards starting from the bottom of the screen to return to the home screen.