I mean that's always a good thing. That people can feel comfortable about themselves. But I don't see why, unless something very specifically affects your physical capability in your chosen field, being out as gay even matters in this context.
I don't see why it should be commented on any more than being straight. Maybe I'm missing something but what someone does in the bedroom makes no difference to me one way or the other. I literally don't care. Being gay or straight doesn't make you any more or less capable in what you've trained for probably years to compete at.
I really don't see why this needs to be known.

There is probably more of a stigma for men, though. I guess because of how competitive sports are in general. But again... I really don't see how this matters. If it doesn't affect your ability to do what you do, why does anyone need to know about your sexuality? The trans thing... yeah, that's a big deal right now. And a very complicated issue, but being gay or straight... it literally doesn't matter in this cauldron.
I am glad people feel comfortable being out and proud. Living their best lives. But as far as Olympic sports are concerned, who you are attracted to means very little in the grand scheme of things. And it feels kind of weird to me that this is a statistic that needs to be a thing.