I've noticed my name in "Developer Account Summary" and the name that shows up under my app in Testflight both show my name in all lowercase. Is there a way someone can Uppercase the first letter of both my first and last name?
Lowercased developer name
The Account Management support page indicates that you would need to contact Apple Developer Support directly (calling them is probably your best bet based on my own experience though - the link includes numbers for many countries).