Well, the lines of what are the MCU Multiverse are blurred because of Spider-Man: Across the Spider-Verse. I'm sure Selfishmisery shares my sentiment... but I guess it would be since it's an alternate timeline to Earth-120703.
It's weird though, because it diverges after the first film but it's also different before, as seen with Ben's death in The Amazing Spider-Man 2 and Spider-Man: Across the Spider-Verse.
So, should all events in Earth-120703 be part of Earth-[TASM Video Games] that take place prior to The Amazing Spider-Man (Video Game)? I believe they also referenced a comic book that took place after The Amazing Spider-Man in one of the games as well, but I don't remember which or the context.
The "MCU Multiverse" is just a smaller pocket of the Marvel Multiverse anyway. I focus on the latter with these things to keep it simple.