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?

What's new in Spider-Man: No Way Home's More Fun Stuff movie

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

Does Spider-Man Far From Home introduce the multiverse into MCU?

They don't tell you anything': When Tom Holland felt that Marvel will fire him as Spider-Man post his debut in USD 1.1 billion movie

If Sylvie killing He Who Remains opened the multiverse in the MCU, then did it exist during Spider-Man: Far From Home, WandaVision and FTWS? From the perspective of the main MCU universe

Does Spider-Man Far From Home introduce the multiverse into MCU?

Mysterio Explained: Spider-Man: Far From Home's Villain Origin & Powers

Multiverse of Madness? Why the Marvel Cinematic Universe no longer exists in perfect isolation, Movies

Best Quotes in Any Spider-Man Movie, Ranked