Yes, as mentioned multiple times in the outage topic, what was lost was permanently lost, and if you don’t have a backup, you’ll need to recreate your website from scratch:
Fortunately, since you are using WordPress, it may be possible to restore only from the database data (which were left intact). There is a tutorial online (it contains some cPanel-related information like recreating a database in the beginning which you can skip as they don’t apply here, go straight to the " Restoring Your WordPress Site" section):