What am I reading? Marvel high tier characters spite. If Goku could bust an infinite sized universe, that would be the equivalent of a basic type 1 multiverse. There are no infinite sized realms or universes in the entire franchise. DBU has 1 heaven, 1 hell, 1 physical world and 1 kai realm (and until Zamasu’s arc, 2 timelines), while a single Marvel Universe has endless timelines, countless heavens and hells, and countless planes of existence in between, many adyacent realities and infinite spatial dimensions, all tied up by a single Yggdrasil, of which the 9 mayor branches at different levels of existence are The Nine Realms, and Yggdrasil is said to hold countless realms more, and that each of those realms are fully formed Universes in and on itself.
And 1 Yggdrasil = 1 Marvel Universe, each of which has all that I described above, then there are different numbered Universes which are their own version of Yggdrasil housing their individual versions of all that I described as well as that of The Nine Realms of their own, these infinite Universes grouped in infinite Multiverses.