I personally don't think it matters much at all, except in channels that specifically identify that way. However, I am male, hetero, cis, so its possible I'm just clueless.
I'm pretty sure everyone here is a cis man or trans woman, and I think the communities reflect that (noncredible defence = military memes, politics, computer nerd stuff, greentexts, anime nerd stuff), and tbh I can't imagine any of the cis women in my life being interested in anything on lemmy
I'm a cis woman on lemmy, and it's my primary (and only) social media consumption. That being said, I do tend to lean nerdy. Highly doubt I'm the only one on here, tho.
I was about to comment a similar sentiment. I didn't realize I stopped existing or had my gender identity reassigned because I'm on lemmy instead of other social media.