How can I tell if my database is encrypted?
On OmniFocus for Mac, go to Preferences > Sync Preferences > Encryption.
You’ll see if Encryption is active and if you have a separate passphrase set.
On OmniFocus for iOS, go to preferences (gear wheel at upper left) > Sync > Encryption.
This may lead to your other question about the “Passphrase” which is something you could set separately to do client-side encryption so nobody at Omni (or wherever you host your sync data) can decrypt it, even with your login password. You should read the OmniFocus help for more details as this is all written up there.
I think it’s in Show Sync Details
On Point mate!