I read the quote. I’d have to assume that “post writer’s strike ending in late September” is referring to the fact that the strike ended in late September. Also, as I already pointed out, it’s not difficult to imagine that “sources close to the movie” wouldn’t want people to know that the script was changed to avoid parallels to Gaza.
Perhaps Gunn did conveniently remove the Middle East storyline before October 7th, but that sure would be a massive stroke of luck.