What Windows calls OwnerAuthFull is the base64-encoded lockout password (I believe this is terminology inherited from TPM 1.2). You can test it with tpm2_dictionarylockout -c -p file:key.bin, where key.bin contains that password after decoding it with base64 -d.

The TPM2 owner password (owner / storage hierarchy) is unset, you can verify that with this command:

# tpm2_getcap properties-variable | grep AuthSet
  ownerAuthSet:              0
  endorsementAuthSet:        0
  lockoutAuthSet:            1