The internet loves to make fun of Tom Holland as the biggest leaker in the Marvel Cinematic Universe. It's gotten to the point that he is even in on the joke. He once said that he's not really told what's going to happen in the films until it happens in the movies, for fear of letting others know by mistake.
Having said that, it appears that Holland has learned his lesson. He just teased that more plot twists are coming in Spider-Man: No Way Home, without telling everyone what those plot twists are.
What do we know of Spider-Man: No Way Home so far?
Spider-Man: No Way Home is Tom Holland's third solo film as the teenage version of Spider-Man after making his debut in 2016's Captain America: Civil War. Following the departure of the old guard, with the cinematic deaths of Robert Downey Jr.'s Iron Man and Chris Evan's Captain America in 2019's Endgame, Holland and his super-hero persona has taken a much more central role in the MCU.

