Pokémon HOME is a special app that enables Trainers to continue their Pokémon adventures beyond a single game system and manage their collection of Pokémon across many of their games. Pokémon HOME is available now on Nintendo Switch, iPhone and iPad (App Store), and Android (Google Play) devices. Pokémon HOME maintenance took place on January 12 from 00:00 UTC to 03:00 UTC to add compatibility with the Pokémon Scarlet and Violet The Hidden Treasure of Area Zero epilogue.
Source: The Pokémon Company and Nintendo
Source: Pokemon