See my comment here: https://feddit.de/comment/2250211

You're correct that that's something to be considered, and there are different approaches to that that can be debated, but just keeping on using the deadname without recognizing the new name at all is not a solution. You also wouldn't keep referring to newly wed people by their old last name just because nobody yet knows their new name.

Edit: also, your repeated use of "this person" in your comment has transphobic vibes to it. In this comment thread nobody is going to be confused anymore who Emily is, so there is literally no reason to not just use her name. Makes it seem like you're just trying to avoid using her name for some reason.