Let me start this off by saying this is entirely opinion-based.
Tiffany Berruti, with all due respect to you as a content creator as well as a person, I believe I have the right to know whether my partner is a part of the LGBTQ+ community before dating .
I am not saying that my partner's privates are all I care about, however, as a woman with child-bearing capabilities, it is important to me to know whether you are male or female. Yes, I am well aware there are other options for those whom cannot produce children themselves, however, this also comes to personal preference. Some people would love to have a child, while others would adopt and so on.
In a relationship, you should have established a trust between the both of you. If you are withholding important information (such as this), your partner would most definitely be hurt that you hadn't said anything. They'll see it as you didn't trust them enough to speak up, or that you were being deceitful.
In the end, yes, it does matter.
I don't exactly want to have an issue trusting my significant other over a situation such as this. If it was that hard to tell me these things, what else haven't you told me?
