Hindu monuments possible existed then, but they've not survived, Probably simply because they were not designed of stone. A few visuals of recognizable Hindu deities and votive pillars have survived from about one hundred bce to two hundred ce. Hindu temple design started in earnest from the 5th century ce https://hanumanmandiradelaide.com.au/hanuman-mandir-adelaide-a-spiritual-sanctuary-in-south-australia/