Thanks for posting in the Apple Support Communities brendaliss,
If you're part of a family sharing group, the family organizer may need to make changes to your Downtime settings.
If not, on your paired iPhone do the following to manage the setting:
Go to Settings > Screen Time. Then tap See All Activity, select a category in the list below and set limits. You can manage these settings with Screen Time:
Downtime
When you schedule downtime in Settings, only phone calls and apps that you choose to allow are available. Downtime applies to all of your Screen Time-enabled devices, and you get a reminder five minutes before it starts. If you set a Screen Time passcode, Downtime includes an additional setting: Block At Downtime. When you choose this setting and you click Ask For More Time when Downtime starts, entering the passcode allows you to approve the app for 15 minutes, an hour, or all day. Child accounts can click One More Minute once, or click Ask For More Time to send their request to the parent account for approval.
Use Screen Time on your iPhone, iPad, or iPod touch
Cheers!