@monster it is said that the micro verse is low-2c via different statements and items and that the great beyond encompasses all the universe meaning atleast 3 realities which is low multiversal:
The Lightless Abyss, The Great Beyond/The Macrocosm: 2-C to possibly 2-B (The Abyss which encompases the Universe entirely, described as a 'Macrocosm' compared to the physical area defined by the configuration of the Elden Ring. Said to be where the Greater Will resides who fashioned the all worlds of which there are an unknown amount)
https://vsbattles.fandom.com/wiki/User_blog:Blackcurrant91/Elden_Ring_Cosmology
https://vsbattles.com/threads/low-2-c-elden-ring-not-really-though.175103/
The Lightless Abyss, The Great Beyond/The Macrocosm: 2-C to possibly 2-B (The Abyss which encompases the Universe entirely, described as a 'Macrocosm' compared to the physical area defined by the configuration of the Elden Ring. Said to be where the Greater Will resides who fashioned the all worlds of which there are an unknown amount)