She's said a fair bit on the topic of DSDs, for example these tweets:
- https://twitter.com/HJoyceGender/status/1488064619428122625
- https://twitter.com/HJoyceGender/status/1496033865047150593
- https://twitter.com/HJoyceGender/status/1659205823565008897
And in her book, mostly relating to category eligibility policy in competitive sports. Also in some interviews, along the same lines as the above.