Will the WordPress post content be still attributed to the same user?

Say a user owns several posts on the website. After I change the username of that user, will the website still know that the owner of the content is that user? I ask because one of the manual methods to change a username is to create a new one, delete the old one, and WordPress asks at that point “What should be done with the content owned by this user” and the answer is typically to Attribute all content to the newly created user. Not sure if some similar processing needs to be done and whether it is taken care of by this plugin?