Oh damn :/ then uhhhh what gipsum said... there's an old (very naked) zine you can probably find online called "fucking trans women" that a trans woman from Iowa(?) made to describe the ways she & other trans women she talked to had sex after coming out. It’s very 2010-coded but it might be useful to you?
My assumption is that it’s because that isn’t what’s happened to you. Like we said before you’ll probably need to do it a different way going forward but it is still possible. I certainly haven’t heard that was possible in any “effects of hrt” video I’ve seen. In fact I’ve seen people mention needing to masturbate differently