satoshi didn't creat blockchain, because blockchain was created 17 years before Bitcoin was born. and with name Time-stamp. time-stamp was created in 1991 by Stuart Haber and W. Scott Stornetta. but not adopted en masse. because it has a common problem of byzantium. and in 2008 satoshi solved this problem with alternative solutions. namely through proof-of-work created by Satoshi, then Bitcoin was born as a verification tool on the blockchain. so make no mistake. satoshi is not creator of the blockchain. but only perfecting time-stamps (now blockchain) that have common problems and solve them with bitcoin.
blockchain is NOT timstamp
timestamp is just one subfeature of blockchain. as you very well point out. the main top feature of blockchain is the solution to the byzantine generals problem
satoshi even referenced that time stamp was PART of blockchain... but that does not man timestamp was fully solely a blockchain
whats next say that google invented bitcoin because bitcoin used googles datastorage structure.
what the best description would be is that many different features which alone failed th security model that blockchains have, were patchworked together elegantly by satoshi seeing the big picture and it was the combined culmination of it all that made blockchain a masterpiece.
EG a car was not invented 1000 years ago because some cave dweller made a wheel. instead some genius put a wheel, an engine and some seats together in such a unique way that it changed the whole concept of transportation.
so I hope it's not wrong if I make a statement that "satoshi perfects the time-stamp" and becomes a blockchain. because in my opinion the time-stamp is a part of the blockchain that is delayed and then continued and perfected by satoshi. (refine if my explanation is wrong)