Representation of Enbyness in Sport

For Context:
I recently participated in my first bouldering competition in my local climbing gym. There were three classes for participation: Male, Female and Non Binary. I was very happy not to have to participate with the men as i would usually do(due to being amab). Enbies had their own register in the Qualifying and also their own finale. But the boulders that were made for the finale were separated into 2 Male, 2 Female and 1 unisex Boulder. Enbies were supposed to do 1 Male, 1 Female and 1 Unisex boulder in the Finale.

But now the question came to my mind: What physical requirement is there or should be with a NB athlete? How should other people interpret my physical ability in sports? If I compete against another enby, but they are afab, would it still be a fair competition?

I really love, that the bouldering gym is representing enbies in the sport, but competition-wise, what is fair?