Of the plethora of things we have to change, when we update our names or gender markers, is the info that the credit bureaus have on us. And yes, sadly, I am in that same boat because I still need to change mine. So, here are the links to some info for each of the three US credit bureaus you should probably look into as well:
TransUnion - https://www.transunion.com/blog/credit-advice/transgender-name-change-credit-report