Is Spider-Man Far From Home lying about the multiverse?

Trailers for 'Spider-Man: Far From Home' suggested that Mysterio (Jake Gyllenhaal) hailed from the greater multiverse. Were they lying?

Does Spider-Man: Far From Home take place in an MCU multiverse? - Polygon

Marvel Is Going Back to Its Original Multiverse - Inside the Magic

Disney+ Announces Spider-Man: Far From Home Release Date : r/marvelstudios

Spider-Man: Far From Home' Trailer Breakdown: Where's Thor and Multiverse

Spider-Man: No Way Home Ending Explained: It Takes A Multiverse

In Spider-Man: Far From Home (2019) Nick Fury tells Spider-Man that Mr. Beck is from Earth just not yours Explanation in the comments : r/MovieDetails

Spider-Man: Far From Home's big trailer reveal might not be what it seems

Is Mysterio in SPIDER-MAN: FAR FROM HOME a Villain or Hero? - Nerdist

Mysterio's Spider-Man: Far From Home multiverse dimensions, explained - Polygon

Spider-Man 3 Makes Far From Home's Fake Stories A Reality

SPOILER: Spider-Man: Far From Home] Since Mysterio lied about being From Earth-833, is there really a multiverse and Earth-833? - Quora