https://www.milanjovanovic.tech/blog/using-multiple-ef-core-dbcontext-in-single-application
For this project you can run migrations for a specific DbContext using
dotnet ef migrations add NAME -c DBCONTEXT -o Migrations/FOLDER
For example:
dotnet ef migrations add BoardGamesInit -c BoardGamesDb -o Migrations/BoardGames
To update the database
dotnet ef database update -c DBCONTEXT
For example:
dotnet ef database update -c GamesDb