User Profile

So the name on my team name, dev account name and dev forum name is my deadname and I obviously want it gone. I know that I cannot change them normally (which is ridiculous), but is changing any of them an option when migrating from a free dev account to a paid one? So my questions are: 1- I do not have a paid dev account yet. When I get one, will I be able to change one of those names? (or add new ones) 2- Will any of those names that are currently set be publicly seen if I publish an app to the App Store? 3- If I have to create a new account, it is possible to use an account on XCode different from the one on my mac and to use an account on Swift Playgrounds different from the one on my iPad, right? Not really willing to test it myself since if this is not possible I won't pay for this on this account, but will have to create another one. Thanks in advance, Luana