i need to restore my device to an earlier point in time

You can do this using a computer or iCloud backup. However, note that some things are not stored in a backup but it may be able to recovery recently deleted items using the app itself. It therefore helps to know your specific reason for wanting to do this.

Click on this link to discover how to 'Restore your iPhone, iPad, or iPod touch from a backup' --> https://support.apple.com/HT204184

or watch this video if you're using a Mac to do this:

https://www.youtube.com/watch?v=Jbp3gGTQygg

Related information:

Use iCloud to transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch --> https://support.apple.com/HT210217

Some things are not stored in a backup. Click on this link and read "About missing information after you restore your iOS device with iCloud Backup" -->

https://support.apple.com/HT203768

'If you accidentally deleted your calendars, reminders, bookmarks, or contacts from iCloud', click here --> https://support.apple.com/HT205018

'If you're missing photos or videos in the Photos app' on a mobile device, click here --> https://support.apple.com/HT205912

- Check your Recently Deleted folder

If you have an older iCloud backup, you can restore your phone to that backup.