Trans women aren't excluded from sport.
Sport is segregated by sex: male and female. Everyone is either male or female.
The only people who are actually excluded from competitive sport are people with DSDs who can't compete in their own sex category without unfairly disadvantaging other competitors (a vanishingly small number of people) and trans men who have taken testosterone.
Trans women are perfectly free to compete alongside their own biological sex.
If they want to compete according to their gender identity then they need to set up their own sporting competitions for people who (a) believe they have a; and (b) want to compete according to their, gender identity.
It has got fuck all to do with 99% of the population.