What social media? Satoshi was a private individual. You won't find him posting on Facebook and uploading pictures of himself writing code on Instagram. Telegram wasn't around at the time they were active. Apparently there were some tweets on Twitter, but who knows who controlled that account. Reddit was around 2009/10, but I don't know if satoshi was active there. He shared his ideas via the dev mailing list, the Bitcoin forum, and private email correspondence.