Hindu monuments probably existed then, but they may have not survived, Potentially simply because they were not created of stone. Several photos of recognizable Hindu deities and votive pillars have survived from about a hundred bce to 200 ce. Hindu temple building began in earnest with the fifth century ce https://hanumanmandiradelaide.com.au/lord-shani-dev-hawan-ceremony-at-hanuman-mandir-south-australia/