https://en.wikipedia.org/wiki/Remast...20videographic.
Again, you don't understand what a remaster is. They took a 720p/30fps game and made it 1080p/60fps(later 4k/60fps on the pro) and increased texture quality and used higher quality character models from the cgi scenes. It is the definition of a remaster.
You seem to be the only person lost here, a remaster is taking original product and improving the quality of it. What happened here? This isn't rocket science dude and it's an odd hill to try to die on.
Just to give you an idea of how silly you're being with the "its a port!" take, yes it is a port. Every remaster is a port. A remaster by definition is a port, and being a port doesn't make it not a remaster. In fact any port that improves the quality of a game is a remaster. TLOU was one of the first(might of been first not sure but definitely one of) games to even use "remastered" as previously it was only used for audio and video recordings, not for games. It was definitely the game to popularize the term and if not for it, you probably wouldn't even know the word exists or be using it to describe games because you definitely don't know the definition of it so you didn't learn it naturally.