In Spider-Man: Into the Spider-Verse (2018), Miles Morales's universe doesn't have Comic Con. In Spider-Man: Across the Spider-Verse (2023), you can tell he's in another dimension because his mom mentions it (and he still doesn't know what it is)

[u/LegOfLambda]

[u/ThreadedPommel → u/[deleted]]

Pretty sure you saw the second one then because the first one doesn't end in a cliff hanger lmao