I suppose what you'd be looking for is Sanskrit-derived names, but they're more associated with Hinduism. Would Khushdil count as 'authentic', as (I believe, someone correct me if I'm wrong, Urdu isn't my strong suit) it literally means 'happy heart' in Urdu and Hindi? Would Bahadur be another? There may be some Urdu names, but they may have Arabic and Persian influence, so unsure if they'd count as authentic. Farishta is one I've heard too, I know it means angel in Urdu, but may be the case in Farsi too?
I heard that there were quite a few Pakistani-Punjabi names that have been lost. I should do some reading into the ancient Indus, I'm sure it'd be fascinating. Would be cool to consult an Indus historian on this, but I'm sure it'll be a very niche topic.