Ironically, the publication had to issue an erratum due to omitting credit for the Indian professor CK Raju who first published these findings.
I think it's likely that ancient (or not-so-ancient but far from the roots of European civilization) scholars invented a lot of things before the so-called inventors. Many more than we'll ever know about.
I usually say something like "It's really dumb that we recognize the inventors of things, because if not for that person, someone else would have discovered it in a year, or a decade, or a hundred years, and those potential inventors get no credit" but in this case it might sound like a Westerner trying to downplay the accomplishments of non-Western scholars.
The article also mentions the fact that "Jesuits were in the area during that time."
It is well known that in the west during that time, the church kept a vast array of knowledge closely guarded from the general population, potentially a cause for the dark ages.
It is entirely possible that the Indian innovations were actually in fact passed to them from the Jesuits, only to be published by the Indian school and then eventually making its way back to the European masses.
And before that it's most likely the same discoveries were made by the Syrians and so on and so on...