International Rupay Platinum Debit Card always had International lounge access,
It's just that most banks issue Domestic Rupay Platinum Debit Card which only had domestic lounge access
As far as actual access is concerned, you can just swipe your card directly to get into lounge ,atleast that's what i did with my Union Bank Rupay Select Debit Card at KLIA 2 earlier this year ,so should be same