No Google documentation lists follower counts, likes or posting activity as ranking signals, so treat those claims as unconfirmed. Social media works indirectly: Google's SEO starter guide recommends "social media promotion" and calls word of mouth "one of the most effective and lasting ways" to build traffic, because people who discover you there may link, search for you and return. Tie your profiles to your site with Organization structured data on the home page; its sameAs property lists "your organization's profile page on a social media or review site" and helps Google "disambiguate your organization" (Metadata and SEO).
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "Organization",
"name": "Example Widgets",
"url": "https://www.example.com",
"logo": "https://www.example.com/images/logo.png",
"sameAs": ["https://www.linkedin.com/company/example", "https://github.com/example"]
}
</script>