Hi there
Someone asked about something similar here:
https://discord.com/channels/1108396290624213082/1181043612545450024
I wouldn't recommend changing the home page's header to the users name since that would be visible to everyone but maybe you could create a subdirectory for the user that would look just like the home page but with the users name in the header🤷♀️
I'm not an expert here so this was just an idea.