Kellie already boxed and beat Khelif in the Tokyo Olympics in 2021. She's not in the same weight category this time.
We can all feel sorry for children who appear to be female-ish when born, i.e. no external male genitalia, who don't have access to the kind of medical care that would check what their chromosomes are, who are assumed to be girls, and then find out at puberty that they are turning into men, because they are actually men with XY chromosomes. They have medical conditions which prevent the full development of male genitalia - they don't have female genitalia either, as some people claim.
It must be tough for children with DSDs, and it would have been nice for Khelif and Lin to have been loved and supported and cared for as they adjusted to the fact that they are male. Instead, they use their condition to take part in women's sports, using their physical advantage unfairly for fame and fortune. It may well be that they are cynically recruited when young to make money for their 'management', which is also very sad for them. But being sympathetic to their situation doesn't make them any less male.
Khelif and Lin were tested in the past and found to have XY chromosomes. Although the IBA who did the tests was later discredited, both boxers accepted the results, and they were disqualified from women's boxing by the IBA. So they can't pretend they don't know that there is widespread belief that they are not women, and if they are so sure they are, they could volunteer to take the simple cheek swab the IOC used to use.
Instead of the swab test, the IOC now says males are eligible to compete against females if they are 'legally' female, all they need is F on their passports. And we know how easy it is for men to self-identify as women and get passports which state that they are female. And hey presto! they'd be eligible to box against women in the Olympics!