"Unique" is definitely not necessary. Look at the dominant social media platforms of the last two decades. MySpace -> Facebook -> Twitter -> Instagram -> Snapchat -> TikTok. Each of them was a minor evolution over the last, with the core feature set remaining basically the same. Lots of user-generated content, algorithmic recommendations, likes, comments, DMs, ads. There has really not been a revolution in the social media space since it was invented.