Hindu Monuments possible existed then, but they've not survived, Probably because they were not built of stone. A number of visuals of recognizable Hindu deities and votive pillars have survived from about a hundred bce to 200 ce. Hindu temple building started in earnest in the 5th century ce in https://hanumanmandiradelaide.com.au/lord-shani-dev-hawan-ceremony-at-hanuman-mandir-south-australia/