Entity Framework: How do you apply provider specific model changes in Entity Framework Core 2.x?

Question

I have the following code in my DbContext

protected override void OnModelCreating(ModelBuilder builder)
{
    // ...

    // Shorten key length for Identity
    builder.Entity<ApplicationUser>(entity => entity.Property(m => m.Id).HasMaxLength(127));
    builder.Entity<IdentityRole>(entity => entity.Property(m => m.Id).HasMaxLength(127));
    builder.Entity<IdentityUserLogin<string>>(entity =>
    {
        entity.Property(m => m.LoginProvider).HasMaxLength(127);
        entity.Property(m => m.ProviderKey).HasMaxLength(127);
    });
    builder.Entity<IdentityUserRole<string>>(entity =>
    {
        entity.Property(m => m.UserId).HasMaxLength(127);
        entity.Property(m => m.RoleId).HasMaxLength(127);
    });
    builder.Entity<IdentityUserToken<string>>(entity =>
    {
        entity.Property(m => m.UserId).HasMaxLength(127);
        entity.Property(m => m.LoginProvider).HasMaxLength(127);
        entity.Property(m => m.Name).HasMaxLength(127);
    });

I only want to apply these changes to the models if the server/provider being used is MySQL. What is the best way to do that?

This answer suggests the following which feels hacky

DbContext.Database.Connection.GetType().Name

This answer suggests using checks such as Database.IsSqlServer() which is fine but I cannot find a Database.IsMySqlServer() method anywhere

Please help. Thanks.