Case Sensitive with Entity Framework Core 7 code-first

I create a database with Entity Framework Core 7 code-first. I look at other questions, but none of them have a concrete answer. I try to save these two names as different rows to my table:

Male & male

This is my class for attribute:

[AttributeUsage(AttributeTargets.Property, AllowMultiple = true)]
public class CaseSensitive : Attribute
{
        public CaseSensitive()
        {
            IsEnabled = true;
        }

        public bool IsEnabled { get; set; }
}

This is my db model:

public sealed class Gender : AggregateRoot, IAuditableEntity
{
    private Gender(Guid id, ItemName name) : base(id)
    {
        Name = name;
        ModificationReason ??= Reason.Create("Default").Value;
    }

    private Gender()
    {
    }

    [Required]
    [CaseSensitive]
    public ItemName Name { get; set; }
    public bool IsActive { get; set; } = true;
    public DateTime CreatedOnUtc { get; set; }
    public Guid? CreatedOnBy { get; set; }
    public DateTime? ModifiedOnUtc { get; set; }
    public Guid? ModifiedOnBy { get; set; }
    public Reason ModificationReason { get; set; }
}

This is EF Core DbContext from version 6.0+:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Conventions.Add
        (new AttributeToColumnAnnotationConvention<CaseSensitive, bool>
        ("CaseSensitive", (property, attributes) => attributes.Single().IsEnabled));
}

But this doesn't work in EF Core v7 anymore. How can I make it work with EF Core 7?