My understanding is that Apple App Names are unique (no two apps can have the same title). Along this same line, are Developer names also unique?
Apple Developer Name Unique?
Does it matter? Does your own name conflict with an existing developer?
My understanding is that Apple App Names are unique
Where did you get that understanding from?
I don’t know what the current policy is, but some years ago someone produced an app with the same name as one of mine.
Even if you can find some Apple statement saying that app names are (now) unique, be aware that they can and do change such policies if it suits them to do so.