Here are the version 1.2.1 patch notes.
As we reported last month, Alolan Form and Galarian Form Pokémon that were transferred from GO to HOME between 11th and 16th November mistakenly received the movesets of their standard forms. If your Pokémon were affected in this way, you can now update HOME, connect it to your copy of Sword or Shield, and your Pokémon’s movesets will be fixed.
Read the full article on nintendolife.com
Nintendo Life | Latest Updates