Even if he did that will take some time before you even decode some of it and worth noting is that Satoshi was an enigmatic one and hiding some private keys here will be enigmatic too. It's interesting to find out but I doubt there is or it will be that easy.

'In my opinion, the existence of so many distinguishers is an indicator that Patoshi wanted his/her blocks to be identified.'
'... D. Satoshi  left a message fingerprinted in the nonces. A Message for us to see in a distant future.'
https://bitslog.com/2020/06/22/a-new-mystery-in-patoshi-timestamps/

combined with

' Maybe Satoshi created the greatest prize competition and the privatekeys are somehow within the blockchain.'
https://bitcointalk.org/index.php?topic=175996.msg53058144#msg53058144

😀

We are trying.