Do Social Links work as Backlinks?

Nope, afraid not.

You need all of these to be true and in 90% of cases – they are all false

1. The page must rank and get traffic – most aren’t indexed
2. The link must not have “nofollow” – all of them do
3. The page must be linked from something – none of them are

Read What does Google say about Social Signals in SEO up to 2025 for actual quotes from the Google team