From a logical point of view, FFVII Remake is not on that Sony exclusive list as that would mean "lifetime exclusive" which I highly doubt it is. Square Enix most likely don't want to think about other platforms for now and getting the first game out seems to be the priority. It also makes it easier to develop and faster to release as they don't need to worry about optimizing it for multiple systems.
Regarding Death Stranding, you answered it yourself. It is probably planned to be released on PC or something down the line, which also doesn't make it a lifetime exclusive. The Last of Us Part II is 100% a PS4 exclusive as Naughty Dog is a first party development studio as I understand and therefore, that game is on that list (Jack & Daxter, Uncharted and The Last of Us are all Playstation exclusives).