Hindu monuments likely existed then, but they've not survived, Probably simply because they were not built of stone. A number of photographs of recognizable Hindu deities and votive pillars have survived from about one hundred bce to 200 ce. Hindu temple design started in earnest with the 5th century ce https://hanumanmandiradelaide.com.au/establishing-neem-karoli-baba-statue-at-hanuman-temple-south-australia/