This issue was reported to matrix channel at https://matrix.to/#/!eMLMv62wAMCW1V-ufL_bJ_JDngDhrpSOSEQBLzX8aTg/$iRp1dbzsEccWkPfUN2BR4d6KPW7sYQsD7rGBPhIlY7g?via=matrix.org&via=nitro.chat&via=envs.net
Passphrase for saving Public key (not a secret) in OEM/user re-ownership questionnaire is not asked. (I guess it's a big where I don't understand why locking a public key behind a luks container.... It should be on a public partition).