Folders, contents and other assets display outdated user name/surname

Issue

Within the Site administration, asset creators' names are displayed for folders, web content, and documents.
Updating a user's name and/or surname does not reflect these changes in the aforementioned resources; instead, the previous values continue to be displayed.
Can these changes be propagated?

There is no out-of-the-box method to modify this behavior. Records such as folders, documents or web content permanently store the author's name at the time of the action in dedicated database columns, such as username o statusbyusername.
Therefore, if you need to change the existing values, you would have to do it yourself with some customization. Note that Liferay Support will not be able to assist with designing or implementing customizations.
In the long term, you could consider implementing a Model Listener that performs these modifications when the user is updated.