MCU Spider-Man 'Different' than Sony Spider-Verse
Quickly: The Spider-Man appearing in the MCU won't be the same Spider-Man in the Sony Spider-Verse. Although both played by Tom Holland, there is an alternate-timeline Spider-Man perhaps caused by the Avengers, a part of the MCU multiverse. So Holland is indeed the hero who can cross cinematic universes, as stated by Kevin Feige. This will be explained by Doctor Strange.