

If you have your encryption key backed up, you have a chance to decrypt it still. It’s also possible, but unlikely, the key somehow survived the ISO write and it was written elsewhere on the drive, allowing the key to be recovered. I would only trust such with a professional. (There is basically a smaller encrypted section that your typed-in password decrypts, that section contains the encryption key the rest of the drive uses.)
Honestly though, if you have your stuff backed up (you do have your stuff backed up elsewhere?!?), just restore from your backup and call this a loss.
If you don’t have a backup, this was your wakeup call. Always have a backup going forward.
Yeah, it’s very unlikely it survived.