Hey malisa144,
Thanks for posting in Apple Support Communities. We understand that some of your contacts went missing after updating iOS.
It sounds like you were able to restore some of them using these steps: Restore contacts stored in iCloud on iCloud.com - Apple Support
1. On iCloud.com, go to Account Settings, then click Restore Contacts in the Advanced section.
Available versions are listed by the date and time they were archived.
2. To the right of the version you want to restore, click Restore.
There may be more versions than can be displayed. Scroll to see them all.
Note: Wait until iCloud finishes restoring your contacts before you change them. During the restore process, any changes you make aren’t saved.
If you haven't already, we also recommend checking that contacts are enabled for all accounts in Settings > Contacts > Accounts.
If that doesn't resolve the issue, reach out to Apple Support directly for a closer look: Contact - Official Apple Support
Take care!