That's regrettable yes, as any centrism. But people interested in epistemology certainly are aware of major contributions to sciences by Indian thinkers.

Biased coverage is unfortunately rather widespread in more general media. And rise of nationalisms don't help in the matter. Which is true for western and eastern countries by the way.

Regarding a case of several millennia of prior art, there is Pāṇini, who employed metalanguage long before the idea become of interest in western side.

https://en.wikipedia.org/wiki/P%C4%81%E1%B9%87ini