It's my understanding it can't be Swyer syndrome because the appearance of Khelif is clearly masculinised, and you don't get that with Swyer.
We've been told that they have high testosterone, again something you can't get with Swyer.
And the coach let slip that they've been taking testosterone suppressants. Again not something you do with Swyer.
All the reports are bringing people to the conclusion that it's 5-ARD. Where the person specifically benefits from male puberty.
Genitalia would've been ambiguous at birth, hence the F. But at puberty, it would be clear.
Colloquially it's known as penis at 12. The testosterone has no effect at birth like in regular boys, so the genitalia can look female.
But at puberty it starts to work.
Hence the very male appearance. Many men with 5-ARD have gone onto father children, as they have internal testes which will produce testosterone and, under a procedure, can also produce sperm.
They are male, chromosomally, in appearance, and with internal organs. Plus, of course, with male physical advantage over women.