Warning! This article contains SPOILERS for Spider-Man: Across the Spider-Verse.Spider-Man: Across the Spider-Verse included four live-action universes among the many different dimensions that appear in the film. The follow-up to 2018's Spider-Man: Into the Spider-Verse managed to surpass the original film in every possible way, which is not an easy feat, as the first Miles Morales big-screen animated adventure took home a Best Animated Feature Oscar and many other awards throughout its run. Knowing the huge task they had if they were to improve on what the first film had done, the team behind Spider-Man: Across the Spider-Verse decided to go even bigger with the multiverse, which worked wonders in the sequel's favor.
https://screenrant.com/spider-man-across-the-spider-verse-live-action-universes-explained/