Nope... Nobody has claimed it as an original song. Kausir Munir has written the lyrics which is completely based on the Sabri brothers "Bhar Do Jholi Meri".
Kausir Munir has only made small changes to connect with the filmy audience otherwise it's largely based on the original qawwali itself.
Since the song itself is a prayer to god which is meant to be sung so I don't see much controversy/critcism here.
And the comments are not disabled. Check again, I'm able to read all 166 comments on t-series channel.