So everybody forgot that Peter existed. I assume that everything in the past still happened: Civil War, Endgame, the 2 other Spider Man movies, but that people just forgot Peter's (not Spidey's) part in these movies. So did the events in No Way Home happen and people just forgot Peter's part? Did Zendaya and Ned help Spider-Man? If so, what is their reasoning for doing so? Or was their whole participation just wiped from their memory?
Millsey's has a habit of misidentifying plot holes everywhere he goes. This is not a plot hole. As you noted, elmacho, Spider-Man is remembered. Peter is not. Peter is not relevant to anyone in his various cases. Ned and MJ do not, likely, remember anything about being involved with Spider-Man's previous adventures. The Avengers don't remember, if they ever knew, how Iron Man contacted Spider-Man. They just know he did and Spider-Man was involved in the Thanos War.
Peter never did anything in any of those adventures that would require those who used to know him to remember him.
thank you. interesting that Peter chose to make his own suit at the end. I assume that he could have went to Happy or Avengers Headquarters (is there still one, I can't remember) and ask for a new suit. But I do like how it looks like they are bringing down his tech level. The next movies will almost be like his origin story.