Depends what you mean by "F2M." Some people take F2M to mean "female to male." But nowadays it can also mean female to masculine, and often does. This particular athlete very pointedly "identifies as" "non-binary transmasculine, not as a "transman."
Female people who call themselves transmen or "trans men" want to be seen as men. They typically take exogenous T in very high doses in order to bring their blood levels into the normal male range. Most also desire and try to maintain male levels of T by continuing to take high-dose T on a regular basis over the longterm.
But female people with Cat Calamia's kind of gener identity and expression usually don't want to be seen as men. They want to be viewed as occupying a middle ground and belonging in a brand-new in-between category.
Their aim is to be perceived and socially and legally recognized as neither men nor women, but as non-binary people who feel, see themselves and present as masculine or masculinized - aka transmasculine or transmasc for short. If they take exogenous T, they often take it at lower doses - and for shorter periods of time - than transmen do.
The opposite-sex counterpart of a female person who "identifies as" non-binary transmasculine - or NB transmasc for short - is a male who "identifies as" non-binary transfeminine or transfemme. Like the prominent entertainers and "infuencers" Jonathan Van Ness, Jeffrey Marsh, Alok Vaid-Menon and Travis Alabanza.