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?

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

Spider-Man, Marvel Cinematic Universe Wiki

Spider-Man: No Way Home - Wikipedia

Spider-Man: Far From Home' trailer is a coda for 'Avengers: Endgame

Spider-Man No Way Home Trailer Some Hidden Details Facts And Important Connection Tom Holland Zendaya Benedict Cumberbatch

Spider-Man: Far From Home' Is a Rumination on Fake News - The American Prospect

Spider-Man Far From Home' Multiverse: What Mysterio Means for the MCU

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

Spider-Man: No Way Home plot holes addressed by Marvel writers