Possible to migrate to MySql or Postgres

[RainerKoller]

I've add package Pomelo.EntityFrameworkCore.MySql (7.0.0), added the dbContext to the services via option UseMySql(), changed the connection string accordingly.
However, the table __EFMigrationsHistory is created, but it fails to create thre rest of the tables, because the InitialCreate Migration still has the MSSQL dialect. Trying to re-create the InitialCreate Migration leads to the same Error when trying to create first table (other than __EFMigrationsHistory)

Anyone ever migrated to MySql or Postgres?

[RainerKoller]

I've temprarily uncommented the seeding of the database. Created a new Initial Migration (with the MySql dialect) via
dotnet ef migration add
and
dotnet ef database update
command, which then created all my tables in the MySql database as expected. After done this, I've added the seeding of the db (Program.cs - await initialiser.SeedAsync();)