I had a coworker with this name-- her parents were British and moved to America right before she was born. It was definitely the first time I had heard the name, and at first I thought it was strange... but the more I interacted with her, the more I liked it! Her close friends called her "Pip" or "Pippa". The character in Bridgerton has probably introduced this name to a lot of Americans, so I think it is a unique, interesting, and fine name for a modern baby.