The men they referred to don't have endometriosis, as they are men, without uteruses or the lining of said uteruses - the endometrium. Endometrial cells from here cause endometriosis, in women with uteruses. Endometrial cells are a type of Epithelial cell, of which there are many types in all bodies, of both sexes. They line things, like organs and blood vessels https://www.ncbi.nlm.nih.gov/books/NBK559063/#:~:text=Epithelial%20cells%20are%20among%20the,physiological%20functions%20in%20different%20organs.
Epithelial cells have the ability to move or migrate, in some circumstances, and hence are implicated in lots of human 'inappropriate growth' conditions, like endometriosis in women, some forms of cancer, warts etc.
29 men have a similar condition to endometriosis where a similar type of epithelial cell from somewhere else in their body (not endometrial cells from the endometrial lining of their uteruses, because they don't have them) behave is a similar 'migrating to the wrong place' way and cause a similar 'clogging up' issue to endometriosis. This is not endometriosis, because they're not misbehaving endometrial cells and calling it endometriosis in men is a misnomer. It's like saying that men get ovarian cancer or women get testicular cancer. Similar, related, same type of tissue involved, yes, but the sex-specifc version, and not the same disease with not the same prevalence, treatment, progression, survival rates etc because found in the very different hormonal and genetic context of the 2 different sexes. As evidenced by the fact that Steph and Jodie can only find 29 men with this condition, as opposed to the millions that suffer from endometriosis.
Perhaps, given Steph's lack of credentials and the charity's small size and modest funding, it could be more usefully repurposed to support the 29 men with this distressing condition. As Steph's only motivation is a passionate desire to help people who are suffering, Steph could probably do a lot of good here raising the profile of this condition in men and transwomen, who Steph is also passionate about.