No you didn't. You provided a quote of them saying to submit a PS4 game for certification, it has to be compatible with PS5.
Well if your definition of "compatibility" is what this will come down to - it's no surprise you've argued and lost a 100 times now lol
I don't know what else to say to you man - that's how Dev environments are these days for not just for PS5 but for Xbox, iOS, android and more or less every other modern device.
It's rare these days for an API change to break currently in development code - OS and engine developers are careful to deprecate for a good few iterations first. Either way - this change won't have come from Sony at the end of June - the libraries will have been changing over several releases - it's an evolution, not a revolution.
Either way - building a game now that is compatible with PS5 OS and Hardware without the need for further abstraction or emulation, is "compatible" by any normal definition of the word.
GOT is a PS5 game - it doesn't require all the features of the PS5 hardware, neither will a lot of PS5 games in future, but they're PS5 games none the less.