This is beyond weird. Saw it on promo and I wanted to buy it so my son can play on the PS4 Pro in the living room and sometimes play together on my PS5, but they don't offer a PS4+PS5 option yet, and no upgrade as well. And it looks like there are also separate versions for Xbox One and Series X/S. Such a shitty thing to do.
Yes you can play the old gen verstions in PS5/Series S/X but come on.