Hindu monuments possible existed then, but they have not survived, Most likely simply because they weren't developed of stone. Several photographs of recognizable Hindu deities and votive pillars have survived from about a hundred bce to 200 ce. Hindu temple construction commenced in earnest within the 5th century ce in https://hanumanmandiradelaide.com.au/dr-shri-shyam-sundar-parashar-ji-event/