I think it depends on the child one has and whether we're talking about a health/safety thing or an optional fashion thing.
I have one child who devoured every book I have about puberty and then some. She asks and talks about everything that comes to her mind, brings things to me all the time. I have covered in-depth hygiene, relationship, and sex-ed things with as well, but I don't really need to prompt anything about the optionals -- she's made clear she's very aware of them and happy to talk and ask me about them when she wants to. When she's had some issues with sweat/teen smell, she was happy to discuss options with me. If I bring them up out of no where, she worries she's done something wrong, so for optional things, I just don't, and for health/safety things, I frame things carefully.
I have another child who never asks anything, who has previous ran out of the room when others have asked questions he's uncomfortable with, and while he went through the same lessons as his sister diligently, he feels they were 'thorough enough' and pretty much coasts on that. With him, I need to make a lot more effort -- when his sister asked for a razor, I asked him if he wanted one too, because I know he's not going to ask and neither his father or I have razors or similar in the house for him to use without asking as I did as a kid. I'm not sure he uses it after he was shown how, but it's all there for him.
I'd discuss the health/safety ones anyways, but I have to make sure the optionals and issues that he's having I have to make sure are brought up as he's shown he rarely asks anything without prompting and when he does bring things up, he has rarely thought them through beyond 'I have an idea' and needs someone to give him information to process and discuss unlike his sister who brings me preferences and ideas & I'm just facilitating her interest.
I've another daughter who is in the 'I'm not asking nothing' camp though she benefits from being able to try out things with her sister (we've already had trying bras because her big sister had them and then deciding she doesn't want to anymore) and my youngest son is in the 'I will discuss everything at you' camp so far. I'll handle them each differently depending on how they are as they get older.