How does this help the problem of ~3 companies dominating social media in the US? Congress just derided Facebook's ability to acquire Instagram in a public hear

How does this help the problem of ~3 companies dominating social media in the US? Congress just derided Facebook's ability to acquire Instagram in a public hearing a week ago, and now this feels like a similar play. It's a shame that TikTok has the baggage of being funded by China, because otherwise they created a great app that's so far been able to rapidly rise and compete against the incumbents. We need more of that.