Can I Link Multiple Nintendo Accounts to Pokémon HOME?
No, Pokémon HOME can only be linked to one Nintendo Account at a time.
However, the same Nintendo Account can be linked to both the Nintendo Switch and mobile versions of Pokémon HOME, which will sync the information between the two versions. This means that Pokémon you receive in the Nintendo Switch version of Pokémon HOME version will also appear in the mobile version (and vice versa).