I really like the fanfic 'Spiderman's Extended Journey in Far From Home'. This one delves deeper into Peter's experiences in Europe. It not only includes more action scenes but also further develops his character growth. There's also a fanfic that focuses on Ned's perspective during the events of the movie, titled 'Ned's View of Spiderman Far From Home', which gives a fresh look at the story from a different character's point of view.
Well, in a really far - fetched way, perhaps both can be seen as stories of growth. In Spiderman Far From Home, Peter Parker is growing into his role as a more responsible hero. In a Christmas story about George, George might be growing in character, learning the true meaning of Christmas. But really, this is stretching it as they are very different in nature.
It's hard to see a direct influence. Spiderman Far From Home is based on the Marvel superhero universe and has its own set of rules and storylines. George's Christmas Story, which is likely more about Christmas - related themes, doesn't seem to have much in common with the world of Spiderman. Maybe the only influence could be in terms of character growth and moral lessons, if we really stretch it.
You can start by checking out fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just type in 'Spiderman Far From Home' in the search bar and you'll get a bunch of fanfics related to it.
Overall, there are similarities, but the movie version of Mysterio also has some differences and updates to fit the cinematic universe. For example, his motivations and backstory might have been tweaked for the big screen.