In Pokemon Sword and Shield, Eevee has eight different possible evolutions (aka Eeveelutions). The evolution you get depends on the method you use to evolve it. These Eeveelution methods are the same as previous games but evolving Eevee into Glaceon and Leafeon is now easier – and Sylveon can evolve with Friendship just like Espeon and Umbreon. And of course, you can always just catch these Eeveelutions – avoiding the work of evolving them all together. Here’s how to evolve Eevee into all its evolutions plus where to find and catch Eevee and its evolutions.
Source: IGN.com Pokemon Sword and Shield Eeveelutions: How to Evolve Eevee