FluentAssertions - Should().BeEquivalentTo() when the mapping expectation is different

Question

I have two classes. SourceDto and TargetModel

public class SourceDto {
 public string name {get;set;}
 public bool male {get;set;}
}

public class TargetModel {
 public string name {get;set;}
 public string male {get;set;}
}

My mapping will return for male property "Male" when the male property of the SourceDto is true, else the result will be string.Empty.

How can I compare the content of the sourceDto and the targetModel in a test? for example, I think I cannot use result.Should().BeEquivalentTo(sourceDto), cause of the expected result type and value is different.

How can I check it with BeEquivalentTo maybe with the options? Thanks