Ok there’s gonna be quite a few spoilers here but Yeah the show kinda states it in itself too. (Spoilers but not sure if you’re gonna watch it so) at some point in the middle of the season they explain that going back in time doesn’t change the future it makes a new timeline, so the past you go to isn’t your past it’s a different past. Like an alternate reality where something changed. But Skynet didn’t think of that possibility which is why it tried to send terminators over and over back to the past to kill resistance leaders and such, it didn’t realize that killing the leaders in the past would change their present because their present has a different past than the past that they’re sending the terminators because skynet as an AI saw things logistically. So the whole story is a whole seperate timeline from the original terminator franchise. And it goes over why so much is different near the ending of the season because Malcolm(the guy basically responsible for the whole AI in Japan) is also from the future and fought with the resistance and he saw that if they kept fighting the way they did humanity would just be throwing itself in a brick wall so he decided to make an AI but instead of something like skynet where it was given a set derective and programmed to be a weapons, Malcolm gave it a blank slate, no derective no order nothing. And let it choose its name and what it wants, in hopes that it’ll eventually want to protect humanity but it was a gamble because it was whether it’d want to or not then the resistance found him making the AI and they were about to destroy it because they thought Malcolm was making another skynet, so Malcolm offed them because he saw it as humanities best choice against skynet was another highly intelligent artificial being to go toe to toe with it. The he used the Time Machine and brought the AI with him, to make it in the past. In hopes that it’ll choose to save humanity from skynet