Hindu monuments probably existed then, but they may have not survived, Maybe mainly because they weren't constructed of stone. Several images of recognizable Hindu deities and votive pillars have survived from about 100 bce to two hundred ce. Hindu temple building started in earnest from your 5th century ce in https://hanumanmandiradelaide.com.au/dr-shri-shyam-sundar-parashar-ji-event/