I know this is a big challenge and they certainly tried hard, but they also have a bit of a record of exaggerating their progress.

Google gives me some links that doubt this claim, e.g. https://www.aljazeera.com/news/2019/10/modi-set-declare-indi..., https://www.dw.com/en/modi-claims-india-toilet-milestone-del...

So, how far are they really?