I have wondered this since reading that it was not until World War I that Gillette marketed a razor specifically designed for women to shave their legs. The hairless ideal for females seems ubiquitous in Greek sculptures and nineteenth century paintings, and every century in between. Did they have early kinds of razors? Or waxing? Or did artists just not paint their body hair?
This question, and variants on it, comes up often enough here to have its own slot on our FAQ, and it was also the subject of an AH podcast episode led by u/mimicofmodes.
There is always more to say, but you might like to check those resources out while you wait for fresh responses to your query.