macOS had always used your Account Name as your Username (Case-Preserving) but from around Catalina onwards it started downcasing usernames, so /Users/Yourname became /Users/yourname.

Is your username Capitalised or lowercased and which do you prefer?

If you’ve run into any issues because of it please share too

^{(If you’re wondering why they started lowercasing usernames they said it was to improve compatibility and reduce issues with command-line tools/scripts - though I never had any issues myself)}