This is wrong.

Uncovering the right shoulder should have been throughout the whole Tawaf and not in the 1st 3 rounds.

Never the less, this is a Sunnah and the Umrah is correct.

I heard from a Scholar of Ahlus sunnah wal jama’a in India that we have to uncover our right shoulder only for the first three rounds in tawaf of the umrah and cover it for the remaining rounds… …I did tawaf and umrah, the same way and returned to my country. Is this OK? If wrong, What should I do?