I can find around 10 different shapes of pasta but not spaghetti.
It is only available in large supermarkets in malls, not in your normal grocery store where you normally go for pasta.
Obviously, it's not as you absolutely cannot find it if you want to obviously as DeathStroKE mentions you can order it, but it has to be one of the rarest pasta varieties (which is also common elsewhere) to find in India.
This alone makes it unaccessible for 90% of the population in India.
Delhi, Indore, Chennai, Jodhpur, and Punjab are my points of reference. (In Delhi it is kinda more accessible)