Is there a facebook/linkedin for devs or technical people?
What would it take for you to join one?
But social media is used mostly for "personal branding" these days, which is someone writing material consistently, several times a week, to make themselves look good. There is no genuine discussion - it's either praise or putting people down. You end up with arguments on why concatenation is stupid and how template literals are the only way to do things.
DEV.to is a nice implementation of a social network though. Github was good until it became a resume item, after which a lot of fake/flexing behavior started to appear. Codepen is also nice if you're into CSS and programmer art.