I can’t go on FaceTime on setting

Hello Ilovemomalotboy,

Thank you for reaching out to Apple Support Communities.

Let's check to see if you have any restrictions enabled:

"Manage Screen Time settings

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.

App Limits

You can set daily limits for app categories with App Limits. For example, you might want to see productivity apps while you're at work, but not social networking or games. App Limits refresh every day at midnight, and you can delete them any time.

Communication Limits

Control who your children can communicate with throughout the day and during downtime. These limits apply to Phone, FaceTime, Messages, and iCloud contacts. This is also where you can decide and manage which contacts are available on an Apple Watch paired through Family Setup. Communication to known emergency numbers identified by your iPhone or Apple Watch cellular carrier is always allowed. You need to have your iCloud contacts enabled to use this feature.

Always Allowed

You might want to access certain apps, even if it's downtime or if you set the All Apps & Categories app limit. Phone, Messages, FaceTime, and Maps are always allowed by default, but you can remove them if you want.

Content & Privacy Restrictions

You decide the type of content that appears on your device. Block inappropriate content, purchases, and downloads, and set your privacy settings with Content & Privacy Restrictions."

More details can be found here: Use Screen Time on your iPhone, iPad, or iPod touch

If the issue persists, can you provide a few more details? When did you first notice this? Also, which device and OS are you currently using?

Cheers!