Hindu Monuments probable existed then, but they may have not survived, Maybe as they weren't crafted of stone. A couple of photos of recognizable Hindu deities and votive pillars have survived from about one hundred bce to 200 ce. Hindu temple construction began in earnest in the 5th century ce https://hanumanmandiradelaide.com.au/shri-pandokhar-sarkar-to-visit-australia-in-october-2024/