Entity Framework Core with SQLite SQLCipher and thread-safe

I want to use

• SQLite with SQLCipher
• Entity Framework Core 3.1
• Multiple Threads that call the Db (thread-safe)

The EF DbContext is not thread-safe natively. My approach was using a new DbContext for each db call, which is looking like that:

DbProvider

public Db GetDbContext()
{
    var connectionStringBuilder = new SqliteConnectionStringBuilder()
    {
        DataSource = this.DbLocation,
        Mode = this.DbMode,
        Password = this.dbPassword,
    };
    return new Db(connectionStringBuilder.ConnectionString);
}

Default Db Call

using (var db = this.dbProvider.GetDbContext())
{
     var dataFromDb = db.DbSetXYZ.ToList()
}

this.dbProvider.GetDbContext() returns a new DbContext instance with a new SqliteConnection.

DbContext

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    this.sqliteConnection = new SqliteConnection(connectionString);
    this.sqliteConnection.Open();
    optionsBuilder
        .UseSqlite(this.sqliteConnection);
}

Without SQLCipher the performance is great. I see no big loading times ~10ms. With SQLCipher, the performace of this.sqliteConnection.Open(); changed to 2 seconds.

Is there any kind of best practice for this scenario?