Since big tech companies seem to have an advantage over smaller ones (otherwise smaller ones would already be dominating the market), presumably they'd just be replaced by large Chinese equivalents, which wouldn't be broken up as they have much more cooperative relationships with their government. TikTok is already quite popular in the west, proving it's possible. Unless the west tries to ban all Chinese social networks, which would require some kind of national firewall, in which case it'd lose any moral high ground it had over China for China's banning of WhatsApp, Facebook and Twitter.
