Hindu monuments probably existed then, but they have not survived, perhaps since they weren't created of stone. Several images of recognizable Hindu deities and votive pillars have survived from about a hundred bce to 200 ce. Hindu temple design started in earnest from the fifth century ce in northern India https://hanumanmandiradelaide.com.au/how-to-celebrate-hanuman-jayanti-at-home-a-guide-to-a-spiritual-and-joyful-celebration/