How to use LinqKit in non static method?

[hanzllcc]

I have the IdentificationType class:

public sealed record IdentificationType
{
        public int Id { get; }
	public string Alias { get; }

	private IdentificationType(int id, string alias)
	{
                this.Id = id;
		this.Alias = alias;
	}

	public bool Equals(IdentificationType? left) => this.Alias == left?.Alias;

	public override int GetHashCode() => this.Alias.GetHashCode();
}

The property Alias is configured as Alternate key, and the Id as Primary key.
I want to use the Equals method in Ef core, in this way:

public Task<IdentificationType?> Find(IdentificationType identificationType) 
{
    return dbContext.IdentificationType
                    .AsExpandableEFCore()
                    .SingleOrDefaultAsync(i => i.Equals(identificationType));
}

When the Find method is invoked, Ef core uses Id instead of Alias.
How I could configure LinqKit to expand the Equals method?